| O'Banion | Wm. F. | 730 | History of Santa Clara County - 1881 |
| O'Bannon | C. S. | 166 | History of Tulare & Kings Cos. - 1913 |
| O'Bannon | C. S. | 195 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Boyle | Thomas J | 337 | History of Kern County - 1914 |
| O'Brian | G. A. | 267 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| O'Brien | Thomas | V.i-424 | The Bay of San Francisco - A History - 1892 |
| O'Brien | Wm. Smith | V.ii-134 | The Bay of San Francisco - A History - 1892 |
| O'Brien | William | 414 | History of Santa Cruz, San Benito, Monterey & San Luis Obispo Cos. - 1903 |
| O'Brien | William R | 383 | History of Sacramento County - 1923 |
| O'Brien | James | 399 | Biographical Record of the Sacramento Valley - 1906 |
| O'Brien | A W | 660 | Biographical Record of the Sacramento Valley - 1906 |
| O'Brien | Edward S. (M. D.) | 956 | History of the San Joaquin Valley - 1905 |
| O'Brien | G. A. | 364 | History of Tulare Co. - 1926 |
| O'Brien | J. C. | 628 | History of Contra Costa Co. - 1882 |
| O'Brien | J. P. | V.ii-310 | The Bay of San Francisco - A History - 1892 |
| O'Brien | James Garlen | 259 | History of El Dorado County - 1883 |
| O'Brien | James | 563 | History of the Sierras - 1906 |
| O'Brien | William S. | 149 | Fresno County: The Pioneer Years to 1900- 1984 |
| O'Brien | Thomas | 378 | History of Solano County - 1879 |
| O'Brien | Maurice | 940 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Brien | O. H. | 201 | History of Kern County - 1929 |
| O'Brien | Oliver | 910 | History of South Coast Counties - 1907 |
| O'Brien | Patrick | 977 | Biographical Record of the Sacramento Valley - 1906 |
| O'Brien | T. | V.i-637 | The Bay of San Francisco - A History - 1892 |
| O'Brien | Thomas F | 383 | History of Sacramento County - 1923 |
| O'Brien | James P | 481 | History of Orange County - 1911 |
| O'Brien | W. S. | 50 | American Biography and Genealogy - California Edition - 1900? |
| O'Brien | Edith Booker | 249 | History of Tulare & Kings Cos. - 1913 |
| O'Brien | Mary L. Heusel | 775 | History of Tulare & Kings Cos. - 1913 |
| O'Brien | J. T. | 193 | History of Santa Clara County - 1922 |
| O'Brien | J. B. | 100, 193 | History of Santa Clara County - 1922 |
| O'Brien | Edith | 181 | History of Santa Clara County - 1922 |
| O'Brien | Chas. M | 174, 175, 177, 182, 187, 189, 190, 192, 241 | History of Santa Clara County - 1922 |
| O'Brien | Kindred | 326 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | Ford | 311 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | Miss | 374 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | John | 401 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | John | 374 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | James | 326 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | J. H. | 109 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Brien | D. A | 39 | History of Alameda Co. - 1928 |
| O'Brien | J. D | 477 | History of Alameda Co. - 1928 |
| O'Brien | William | 498 | History of San Mateo County - 1928 |
| O'Brien | John C. | ~ | Society of California Pioneers - 1912 |
| O'Brien | William S. | ~ | Society of California Pioneers - 1912 |
| O'Brien | Thomas V. | 381, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Brien | Jeremiah J (B) | 1481 | History of Santa Clara County - 1922 |
| O'Brien | Michael (B) | 1353 | History of Santa Clara County - 1922 |
| O'Brien | John | 689 | Illustrated History of Sonoma County - 1889 |
| O'Brien | F. J. | 318 | History of Butte Co. - 1918 |
| O'Brien | Captain | 139 | Genocide & Vendetta: The Round Valley Wars |
| O'Brien | George | 135 | The Way It Was - Tulare Co. - Mitchell - 1998 |
| O'Brien | James | 1091 | History of Yuba and Sutter Counties - 1924 |
| O'Brien | William A | 1249 | History of Yuba and Sutter Counties - 1924 |
| O'Brien | Adelia WARD | 820 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Brien | Patrick (B) | 737 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Brien | Terrence 0. | 737 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Brien | Jerry D.D.S | 1415 | History of San Joaquin Co. - 1923 |
| O'Brien | James Joseph | 358 | History of Sonoma County - 1937 |
| O'Bryan | W H | 1 #27 6/56 | Los Tulares: 1948 - 11/86 |
| O'Bryant | John | 140 | Tulare Community War Album - 1945 |
| O'Bryon | John F. | ~ | Society of California Pioneers - 1912 |
| O'Callaghan | D. | V.ii-169 | The Bay of San Francisco - A History - 1892 |
| O'Callaghan | James | ~ | Society of California Pioneers - 1912 |
| O'Clancy | J. | 214 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Clancy | Mr. | 222 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Colmor | Joseph F | 805 | History of Placer & Nevada Cos. - 1924 |
| O'Connell | William | 1779 | History of South Coast Counties - 1907 |
| O'Connell | Thomas | 613 | History of Monterey & San Benito Cos. - 1910 |
| O'Connell | Thomas | 367 | History of Sacramento County - 1923 |
| O'Connell | Jeremiah | 1320 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Connell | Frank M | 552 | A History of New California - 1905 - 2nd Ed. |
| O'Connell | Frank | 188 | History of Santa Clara County - 1922 |
| O'Connell | T. C. Father | 188 | History of Santa Clara County - 1922 |
| O'Connell | M | 343 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Connell | Daniel | 130, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Connell | June | 312, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Connell | Mary A. | 11, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Connell | Charles T (B) | 992 | History of Santa Clara County - 1922 |
| O'Connell | Elmer S (B) | 963 | History of Santa Clara County - 1922 |
| O'Connell | Thomas (B) | 710 | History of Santa Clara County - 1922 |
| O'Connell | Albert F (B) | 995 | History of Santa Clara County - 1922 |
| O'Connell | G. Daniel (B) | 996 | History of Santa Clara County - 1922 |
| O'Connell | Frank J (B) | 975 | History of Santa Clara County - 1922 |
| O'Connell | M. J | 1489 | History of San Joaquin Co. - 1923 |
| O'Connell Bros | Inc (B) | 936 | History of Santa Clara County - 1922 |
| O'Connor | Martin | 342 | Fresno County: The Pioneer Years to 1900- 1984 |
| O'Connor | M. P. (Hon.) | 351 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Connor | John B. | 862 | History of the San Joaquin Valley - 1905 |
| O'Connor | P J. | V.i-656 | The Bay of San Francisco - A History - 1892 |
| O'Connor | James Joseph | 939 | History of Sacramento County - 1923 |
| O'Connor | J. | V.i-643 | The Bay of San Francisco - A History - 1892 |
| O'Connor | Michael | 473 | History of Marin County - 1880 |
| O'Connor | Hugh T | 929 | History of Orange County - 1921 |
| O'Connor | Jeremiah | 676 | History of Monterey & San Benito Cos. - 1910 |
| O'Connor | B (Rev.) Father | 1146 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Connor | P | 229 | History of San Luis Obispo Co. - 1883 |
| O'Connor | Sarah (Mrs.) | 1149 | History of Placer & Nevada Cos. - 1924 |
| O'Connor | William | 578 | An Illustrated History of Los Angeles County - 1889 |
| O'Connor | J. T. | 386 | History of Ventura Co. - 1926 |
| O'Connor | M. P. Judge | 160, 248, 255 | History of Santa Clara County - 1922 |
| O'Connor | William | 43 | History of Santa Clara County - 1922 |
| O'Connor | M. P. Mrs. | 255 | History of Santa Clara County - 1922 |
| O'Connor | T. P. | 130 | History of Santa Clara County - 1922 |
| O'Connor | Richard | 155 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Connor | Patrick J | 835; Vol. III | History of Los Angeles and Environs - 1915 |
| O'Connor | J. T | 244 | History of San Mateo County - 1928 |
| O'Connor | Myles P. | ~ | Society of California Pioneers - 1912 |
| O'Connor | J B | 1 #51 3/62 | Los Tulares: 1948 - 11/86 |
| O'Connor | M. P Hon. (B) | 654 | History of Santa Clara County - 1922 |
| O'Connor | Percy (B) | 968 | History of Santa Clara County - 1922 |
| O'Connor | James | 340 | History of Butte Co. - 1918 |
| O'Connor | Howard | 1242 | History of Yuba and Sutter Counties - 1924 |
| O'Connor | Neal | 1237 | History of Yuba and Sutter Counties - 1924 |
| O'Connor | Owen | 944 | History of Contra Costa - 1926 |
| O'Connor | J. B. | 204 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | Bridget (Keenan) | 438 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | Daniel | 438 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | Frances | 439 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | John Beebe (B) | 438 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | John | 439 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'connor | Mary STEVENSON | 439 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | Elizabeth (Betinger) | 438 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Connor | William B. Rev. | 368 | History of San Joaquin Co. - 1923 |
| O'Connor | William E | 1035 | History of San Joaquin Co. - 1923 |
| O'Connor | Robert (illus) | 38 | History of Sonoma County - 1937 |
| O'Connor | John | 53 | Alta Pioneers - 1924 - Tulare Co. |
| O'Connor Sanitarium | ~ (B) | 657 | History of Santa Clara County - 1922 |
| O'Daugherty | George | 110 | History of Santa Clara County - 1922 |
| O'Dell | W. H. | 565 | History of Kern County - 1929 |
| O'DELL | Bennie Payne | 147 | Dinuba War Album - 1944 |
| O'Donald | Joe | 214 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| O'Donnel | C. L. | 675 | History of Merced County - 1925 |
| O'Donnel | Charles Wilson | 675 | History of Merced County - 1925 |
| O'Donnel | Margaret RUPERT | 812 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Donnell | C. C | 217 | History of Siskiyou County - 1881 |
| O'Donnell | J. E | V.ii-312 | The Bay of San Francisco - A History - 1892 |
| O'Donnell | John | 446 | History of Solano County - 1879 |
| O'Donnell | Joseph | 1178 | History of Orange County - 1921 |
| O'Donnell | Edward J. Sr. | 578 | History of Sacramento County - 1923 |
| O'Donnell | Mary. | 832 | History of Kern County - 1914 |
| O'Donnell | T. A. | Vol. 4 - 467 | California of the South - 1933 |
| O'Donnell | William T | 564 | History of Solano & Napa - 1912 |
| O'Donnell | John | 913 | Historical and Biographical Record of So. Calif. - 1902 |
| O'Donnell | John | 140 | History of the Merced County - 1881 |
| O'Donnell | Hugh | ~ | Society of California Pioneers - 1912 |
| O'Donnell | Emma | 268, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Donnell | C. C. (Dr.) | 268, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Donnell | James | 170, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Donnell | Emma Gummer | 267, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Donnell | May | 320 | History of Butte Co. - 1918 |
| O'Donnell | Nellie SCRIBNER | 361 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Donnell | James | 88-Vol. 2 | Mendocino County Remembered: An Oral History - Vol. 1 & 2 |
| O'Donovan | Patrick | 811 | History of San Luis Obispo Co. and Environs- 1917 |
| O'Dougherty | George | 387, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Jasper | 565 | History of Sonoma County - 1911 |
| O'Farrell | J. J. | V.ii-640 | The Bay of San Francisco - A History - 1892 |
| O'Farrell | Jasper | ~ | Society of California Pioneers - 1912 |
| O'Farrell | Harry | 1, 2 #66 9/65 | Los Tulares: 1948 - 11/86 |
| O'Farrell | Tom | 2 #59 12/63 | Los Tulares: 1948 - 11/86 |
| O'Farrell | Louis | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Rispah | 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Minnie | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Mary | 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Marguerite | 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Margaret | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Evelyn | 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Elena | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | John | 212, 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Florence | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Gerald | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Jasper | 212S, 215, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Cathol | 212, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Farrell | Jasper | 102 | Genocide & Vendetta: The Round Valley Wars |
| O'Farrell | Harry | 112 | The Way It Was - Tulare Co. - Mitchell - 1998 |
| O'Farrell | Callie (California) | 93-Vol. 2 | Mendocino County Remembered: An Oral History - Vol. 1 & 2 |
| O'Flaherty | Thos. | 324 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Flaherty | Kate | 324 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Grady | Frank | 1353 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Grady | Frank | 378 | History of Solano County - 1879 |
| O'Grady | William (Rev.) | 1482 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Hair | Michael | 605 | Biographical Record of the Sacramento Valley - 1906 |
| O'Hair | M | 417 | History of Colusa County - 1891 |
| O'hanlon | Dan | Vol. III - 149 | History of Orange County - 1931 |
| O'Hanlon | R. T. Mrs. | 230, 246 | History of Santa Clara County - 1922 |
| O'Hanlon | R. T. | 230 | History of Santa Clara County - 1922 |
| O'Hara | Thomas J | 918 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Hara | William | 340 | Memorial & Biographical History of Santa Barbara, San Luis Obispo & Ventura Cos. - 1891 |
| O'Hara | Mary E. Daly | 486 | History of Tulare & Kings Cos. - 1913 |
| O'Hara | Colm J. | 267 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| O'Hara | Patrick J Rev. Father (B) | 1002 | History of Santa Clara County - 1922 |
| O'Hara | William | 1022 | History of Contra Costa - 1926 |
| O'Hara | W. W. | 432-Vol. 2 | History of Santa Barbara County - 1927 |
| O'Hare | Peter | 534 | History of Kern County - 1914 |
| O'Hare | P. (B) | 784 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Haver | Andrew | 354 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | Nellie | 353 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | Josephine | 112, 256 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | James | 353 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | Emma | 354 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | Elizabeth | 353 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Haver | Emily | 354 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Keefe | John H. | 1321 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Keefe | Joseph J. Fr. | 666 | History of South Coast Counties - 1907 |
| O'Keefe | D. E. | 372 | History of San Mateo County - 1938 |
| O'Keefe | John F. | 794 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Keefe | Dennis E | 1414 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Keefe | James T. Jr. | 373 | History of San Mateo County - 1938 |
| O'Keefe | John F | 101, 185 | History of Santa Clara County - 1922 |
| O'Keefe | J. F. | 185 | History of Santa Clara County - 1922 |
| O'Keefe | D. E | 636 | History of San Mateo County - 1928 |
| O'Keefe | Jeremiah | 318 | History of San Mateo County - 1928 |
| O'Keefe | Frank H (B) | 1170 | History of Santa Clara County - 1922 |
| O'Keeffe | Michael | 1091 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Kelly | T. J | 1051 | History of Sacramento County - 1913 |
| O'Leary | Edwin F | 986 | History of Sonoma County - 1911 |
| O'Leary | Archie F. | 115 | History of Sonoma County - 1937 |
| O'Mahony | Charles | 590 | History of Kern County - 1929 |
| O'Malley | John B | 468 | History of San Joaquin Co. - 1923 |
| O'Mara | Cornelius | 886 | Biographical Record of Coast Counties - 1904 - Ver. 2 |
| O'Mara | Sarah | 672 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Mara | Sarah (Conley) | 672 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Mara | Maggie | 672 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Mara | James (B) | 671, 672 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Meara | P. J. | 1444 | History of Kern County - 1914 |
| O'Meara | Michael | 414 | Illustrated History of Sacramento County - 1890 |
| O'Meara | James | ~ | Society of California Pioneers - 1912 |
| O'Meara | | 67 | History of Butte Co. - 1918 |
| O'Melveny | H. K. S. | 583 | An Illustrated History of Los Angeles County - 1889 |
| O'Melveny | H. W. | Vol. 4 - 617 | California of the South - 1933 |
| O'Melveny | H. W. | 183 | An Illustrated History of Los Angeles County - 1889 |
| O'Melveny | Henry W | 408; Vol. II | History of Los Angeles and Environs - 1915 |
| O'Neal | Fred L | 948 | History of Stanislaus County - 1921 |
| O'Neal | Edward. | 2382 - Vol. II | History of Fresno County - 1919 |
| O'Neal | Philip | 944 | History of Mendoncino & Lake Counties - 1914 |
| O'Neal | Ki | 31 | History of Tulare & Kings Cos. - 1913 |
| O'Neal | J.C. | 29, 33 | The Way It Was - Tulare Co. - Mitchell - 1998 |
| O'Neal | Betty Douglass | 599 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Neal | Major | 176 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Neal | Thomas J. | 94 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Neal | William | 598 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Neal | Charles (B) | 598 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Neale | William T. | ~ | Society of California Pioneers - 1912 |
| O'Nei1 | Thomas W | 822 | History of Sacramento County - 1913 |
| O'Neil | Louis | 279 | Fresno County: The Pioneer Years to 1900- 1984 |
| O'Neil | Michael | 727 | History of Sacramento County - 1923 |
| O'Neil | James | 289 | Illustrated History of Sacramento County - 1890 |
| O'Neil | Thomas F. | 641 | A History of New California - 1905 - 2nd Ed. |
| O'Neil | J. S | 420 | Biographical History of Northern California - 1891 - Ver. 2 |
| O'Neil | Jesse | 291 | History of Santa Clara County - 1922 |
| O'Neil | Family | 247 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| O'Neil | Philip G. | 170 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| O'Neil | Robert K. (B) | 877 | History of Santa Clara County - 1922 |
| O'Neil | Jerry | 585 | An Illustrated History of San Joaquin County, California |
| O'Neil | W. P. | 281 | Genocide & Vendetta: The Round Valley Wars |
| O'Neil | John | 1298 | History of Yuba and Sutter Counties - 1924 |
| O'Neil | Sheriff | 114 | Alta Pioneers - 1924 - Tulare Co. |
| O'Neill | Wm | V.ii-26 | The Bay of San Francisco - A History - 1892 |
| O'Neill | P. J. | V.ii-75 | The Bay of San Francisco - A History - 1892 |
| O'Neill | Owen Hugh. (illus.) | 427 | History of Santa Barbara County - 1939 |
| O'Neill | John | 365 | History of Humboldt County - 1915 |
| O'Neill | John Edward | 378 | History of Imperial County - 1918 |
| O'Neill | Timothy | 277 | History of Santa Clara County - 1922 |
| O'Neill | James | 120 | History of Santa Clara County - 1922 |
| O'Neill | J. W | 158 | History of Alameda Co. - 1928 |
| O'Neill | John M. | ~ | Society of California Pioneers - 1912 |
| O'Neill | Mamie | 355, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Neill | William | 355, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Neill | Nora | 75, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| O'Neill | Margaret | 355, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Neill | Charles | 1131 | History of Butte Co. - 1918 |
| O'Neill | Frank | 326 | History of Monterey & Santa Cruz Counties - 1925 |
| O'Neill | J. J | 326 | History of Monterey & Santa Cruz Counties - 1925 |
| O'Neill | John Francis Jr | 1001 | History of Contra Costa - 1926 |
| O'Neill | John Francis Sr | 972 | History of Contra Costa - 1926 |
| O'Neill | C. J. | 432 | History of Contra Costa - 1926 |
| O'Neill | D. L | 302 | History of Kings Co. - 1940 |
| O'Neill | O. H | 340-Vol.1 | History of Santa Barbara County - 1927 |
| O'Niel | R. W | 524 | History of Mendoncino County - 1880 |
| O'Pry | J. T. | 687 | An Illustrated History of Southern California - 1890 |
| O'Quin | James | 5 #3 4/49 | Los Tulares: 1948 - 11/86 |
| O'Rear | Arthur T. (Rev.) | 1519 | History of Orange County - 1921 |
| O'Reilly | Patrick (Rev.) | 1190 | Biographical Record of the Sacramento Valley - 1906 |
| O'Reilly | Patrick (Rev.) | 1145 | History of Placer & Nevada Cos. - 1924 |
| O'Reilly | William R. | ~ | Society of California Pioneers - 1912 |
| O'Reilly | Margaret | 2 #132 9/81 | Los Tulares: 1948 - 11/86 |
| O'Reilly | Reverend Father | 116 | History of Fresno, Tulare & Kings Cos. - 1892 |
| O'Riley | Tom | Vol. 2-178 | History of Sacramento Valley - 1931 |
| O'Rourke | Hugh | 164 | History of Santa Clara County - 1922 |
| O'Shaughnessy | M. E. | 92 | Pioneer Families of Ducor, California |
| O'Shea | P. | 786 | An Illustrated History of Los Angeles County - 1889 |
| O'Sullivan | John | 761 | Historical and Biographical Record of So. Calif. - 1902 |
| O'Sullivan | John | 306; Vol. II | History of Los Angeles and Environs - 1915 |
| O'Sullivan | Cornelius D. | ~ | Society of California Pioneers - 1912 |
| O'Sullivan | Charlotte | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Sullivan | Margaret Admitted | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Sullivan | Edward Jr. | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Sullivan | Alma | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Sullivan | Adelaide | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Sullivan | Edward Sr. | 288, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| O'Toole | James J. | 776 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Toole | Thomas | 627 | Illustrated History of Sacramento County - 1890 |
| O'Toole | Thomas H. | 1350 | Biographical Record of Coast Counties - 1904 - Ver. 1 |
| O'Toole | John | 155 | History of Santa Clara County - 1922 |
| O'Toole | Josephine | 317 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| O'Young | Evandeline | 205 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| Oakes | G. P. | 211 | An Illustrated History of Southern California - 1890 |
| Oakes | James W. | 1119 | History of the San Joaquin Valley - 1905 |
| Oakes | W. B. | 664 | History of Los Angeles Harbor District |
| Oakes | John W. | 853 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Miss Houston | 852 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Margaret I. Houston Allen | 783, 852, 854 | History of Tulare & Kings Cos. - 1913 |
| Oakes | James Wallace | 853 | History of Tulare & Kings Cos. - 1913 |
| Oakes | James W (B) | 853 | History of Tulare & Kings Cos. - 1913 |
| Oakes | J. W. | 852 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Isabelle Hammon | 853 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Hammond | 853 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Miss Allen | 783 | History of Tulare & Kings Cos. - 1913 |
| Oakes | Mary Z | 231 | History of Santa Clara County - 1922 |
| Oakes | Emma | 367, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| Oakes | Oscar | 367, Vol. 2 | History of the San Francisco Bay Region - 1924 |
| Oakes | T. A | 115 | History of Monterey & Santa Cruz Counties - 1925 |
| Oakes | Isabella (Philips) | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakes | J. W. | 204 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakes | James Wallace (B) | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakes | James | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakes | Maggie (_) ALIEN | 335 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakes | Hammon | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakey | John Lewis | 837 | Ingersoll's San Bernardino Co. - 1904 |
| Oakford | Ellen B. | 208 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakford | Benjamin | 208 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakford | Ed | 208 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakford | E. | 209, 210 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oakleaf | Major H. B | 9-10 | History of San Diego County - 1936 |
| Oakley | A. D. | 462 | Illustrated History of Sacramento County - 1890 |
| Oakley | Amasa W | 686 | Biographical Record of the Sacramento Valley - 1906 |
| Oakley | Carey C. | 370 | History of San Luis Obispo Co. and Environs- 1917 |
| Oakley | William C. | 370 | History of San Luis Obispo Co. and Environs- 1917 |
| Oakley | William Calvin Jr. | 952 | History of San Luis Obispo Co. and Environs- 1917 |
| Oakley | W. R | 266 | History of Alameda Co. - 1928 |
| OAKLEY | Robert Ethan | 145 | Dinuba War Album - 1944 |
| OAKLEY | Gene E. | 145 | Dinuba War Album - 1944 |
| Oakley | Amasa George | 477 | History of Yuba and Sutter Counties - 1924 |
| Oaks | Oliver | 2217 | History of South Coast Counties - 1907 |
| Oaks | Mrs. | 276, 310 | History of Tulare & Kings Cos. - 1913 |
| Oaks | Isabella (Philips) | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oaks | J. W. | 204 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oaks | James Wallace (B) | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oaks | James | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oaks | Maggie (_) ALIEN | 335 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oaks | Hammon | 334 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oard | Sadie | 269 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oard | Florence | 107 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oard | Natie | 107 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oard | Paul | 944 | History of San Joaquin Co. - 1923 |
| Oat | Joseph M. | 201 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oates | William John | 121 | History of Santa Barbara County - 1939 |
| Oatley | A. T. | 286 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oatman | H. C. (Dr.) | 10-11 | History of San Diego County - 1936 |
| Oatman | Family | 833 | History of Tulare & Kings Cos. - 1913 |
| Oatman | Ira E. | 377 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oatman | Lucy R. (Nichols) | 377 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oatman | E. F. (B) | 95, 377 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Obad | Nicolaus | 1489 | History of San Joaquin Co. - 1923 |
| OBAR | Wm. E. Mr & Mrs | 148 | Dinuba War Album - 1944 |
| OBAR | Olen H. | 148 | Dinuba War Album - 1944 |
| OBAR | William M. | 148 | Dinuba War Album - 1944 |
| Ober | John | 652 | History of Monterey & San Benito Cos. - 1910 |
| Ober | William | 180 | History of San Bernardino & San Diego Cos. - 1883 |
| Ober | John | 7 | History of Monterey & Santa Cruz Counties - 1925 |
| Ober | George K. | 270 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Ober | Julia M. (_) | 270 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oberdeener | S. | 100 | History of Santa Clara County - 1922 |
| Oberg | Clarence E | 894 | History of Stanislaus County - 1921 |
| Oberg | Gustaf A | 883 | History of Stanislaus County - 1921 |
| Oberg | David | 404 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oberg | David Mrs. | 409 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oberg | P. O. | 404 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oberg | Isaac (B) | 1066 | History of Santa Clara County - 1922 |
| Oberhaus | Mary | 216, Vol. 3 | History of the San Francisco Bay Region - 1924 |
| Oberkamper | William Adolph | 1022 | History of Stanislaus County - 1921 |
| Obert | John H. | 675 | History of the San Joaquin Valley - 1905 |
| Oberte | Joseph | 969 | History of Solano & Napa - 1912 |
| Oberweis | Peter | 1229 | History of Butte Co. - 1918 |
| Obiols | J. F. | 463 | History of Ventura Co. - 1926 |
| Obiols | J. F. | Vol. 3 - 385 | California of the South - 1933 |
| Oborne | John | 1147 | History of Orange County - 1921 |
| Oburg | David | 404 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oburg | P. O. | 404 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Oburg | David Mrs. | 409 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Occidental Poultry Farm | ~ | 758; Vol. III | History of Los Angeles and Environs - 1915 |
| Ochovo | Jose Maria | 22i | Fresno County: The Pioneer Years to 1900- 1984 |
| Ochs | Clara | 263 | Fresno County: The Pioneer Years to 1900- 1984 |
| Ochs | Jost H | 713 | Biographical Record of the Sacramento Valley - 1906 |
| Ochs | Oscar R | 1298 | History of Kern County - 1914 |
| Ochsner | John | 572 | Illustrated History of Sacramento County - 1890 |
| Ockenden | Thomas J. | 208, 209 | Fresno County: The Pioneer Years to 1900- 1984 |
| Ockenden | William | 199 209 | Fresno County: The Pioneer Years to 1900- 1984 |
| Ocker | Charles A | 1100 | History of Placer & Nevada Cos. - 1924 |
| Ockertt | Katherine BUHN | 299 | History of Fresno, Tulare & Kings Cos. - 1892 |
| ODA | Frank | 146 | Dinuba War Album - 1944 |
| ODA | Haruko Takayama | 146 | Dinuba War Album - 1944 |
| Odbert | William A | 736 | History of the Sierras - 1906 |
| Odell | R. A. | Vol. 4 - 543 | California of the South - 1933 |
| Odell | J. Millard | 173 | History of San Joaquin County - 1909 |
| Odell | John W | 822 | History of Sacramento County - 1923 |
| Odell | Marel L | 1167 | History of Placer & Nevada Cos. - 1924 |
| Odell | S. W. | Vol. 3 - 97 | California of the South - 1933 |
| Odell | Warren F | 1167 | History of Placer & Nevada Cos. - 1924 |
| Odell | M. F. | 787 | Illustrated History of Sacramento County - 1890 |
| ODell | C. H. | 244 | History of Santa Clara County - 1922 |
| Odell | Martha | 402 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| Odell | Geo | 86, 213 | Shenandoah Valley Area of Amador Co. - 1854-1904 |
| ODELL | Charley Melvin | 149 | Dinuba War Album - 1944 |
| Odell | Daniel | 583 | An Illustrated History of San Joaquin County, California |
| Odell | Clarence Archer | 808 | History of Contra Costa - 1926 |
| Odell | Harvey M | 871 | History of San Joaquin Co. - 1923 |
| Odeman | Gus | 1216 | History of Kern County - 1914 |
| Oden | W. T. | 128, 239 | Fresno County: The Pioneer Years to 1900- 1984 |
| Oden | William | 169 | Tulare Community War Album - 1945 |
| Odenbaugh | C W | 174 | Tulare Community War Album - 1945 |
| Odenheimer | M. G | 341 | History of Kings Co. - 1940 |
| Oderlin | J. A | 490 | History of Orange County - 1911 |
| Odette | Charles Sr. | 324 | History of the Sierras - 1906 |
| Odette | Frank | 370 | History of the Sierras - 1906 |
| Odum | Alexander (Rev.) | 131 | Fresno County: The Pioneer Years to 1900- 1984 |
| Oed | John | 2387 - Vol. II | History of Fresno County - 1919 |
| Oehl | Julius | 767 | Ingersoll's San Bernardino Co. - 1904 |
| Oehlke | Conrad | Vol. III - 446 | History of Orange County - 1931 |
| Oelke | William J | 1485 | History of Orange County - 1921 |
| Oelkers | Henry | 263 | History of Orange County - 1921 |
| Oellig | Howard H | 1038 | History of Sonoma County - 1911 |
| Oertly | Conrad | 1013 | History of Orange County - 1921 |
| Oertly | Soule C | 1323 | History of Orange County - 1921 |
| Oeschler | Richard | 407-Vol.1 | History of Santa Barbara County - 1927 |
| Oeschner | Henry | 125 | History of Kings Co. - 1940 |
| Oeste | John H | 871 | History of Yolo County - 1913 |
| Oeste | William | 830 | Biographical Record of the Sacramento Valley - 1906 |
| Oettle | Agust | 103 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| Oettle | Gottlieb | 103 | Pioneer Communities of Porterville, Vandalia and Porterville - 1983 |
| Oettle | J G | 1 #129 12/80 | Los Tulares: 1948 - 11/86 |
| Oettle | Gottlieb | 2 #81 6/69 | Los Tulares: 1948 - 11/86 |
| Oettle | Matilda (Kibler) | 694 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oettle | Charles L. (B) | 694 | History of Fresno, Tulare & Kings Cos. - 1892 |
| Oettle | August | 79 | Pioneer Families of Ducor, California |
| Oettle | J. Gottlieb | 2, 8, 79 | Pioneer Families of Ducor, California |
| Oettle | Nellie | 79 | Pioneer Families of Ducor, California |
| Off | Charles F | 397 | History of Kern County - 1914 |
| Off | Charles F | 328; Vol. II | History of Los Angeles and Environs - 1915 |
| Off | J. W. A Major | 333 | History of Los Angeles and Vicinity - Guinn - 1901 |
| Offield | A. L | 89 | History of San Mateo County - 1928 |
| Offutt | Charles A | 762 | History of Sonoma County - 1911 |
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