| DATE OF | |||||
| NAME | NATIVITY | ADMISSION | COURT | VOLUME | PAGE |
| Obert, Eugene | Germany | 8/6/1904 | Superior | ||
| Obiols, Ysidro | Spain | 5/12/1957 | District | 223 | |
| O'Brien, John | Ireland | 8/28/1869 | District | B | 406 |
| O'Connell, William | Ireland | 8/28/1899 | Superior | ||
| Ogilvy, Arthur Edward | Canada | 12/9/1912 | Superior | II | 73 |
| Ogram, Johnson | England | 2/9/1891 | Superior | ||
| Ogston, Stewart | Scotland | 9/7/1918 | Superior | III | 366 |
| Ohlsson, Alex Edward | Sweden | 3/2/1917 | Superior | III | 230 |
| Olivari, Gio Giotto | Italy | 9/26/1903 | Superior | ||
| Olivera, Jose Dias de | Portugal | 7/21/1902 | Superior | ||
| Olsen, John | Norway | 8/5/1892 | Superior | ||
| Olsen, Karl Kleofas | Denmark | 6/4/1920 | Superior | IV | 31 |
| O'Neil, Patrick | Ireland | 7/21/1871 | District | B | 636 |
| O'Reilly, Charles | Ireland | 5/19/1884 | Superior | ||
| Orella, Bruno | Spain | 6/27/1867 | District | B | 204 |
| Orella, Julian | Spain | 7/18/1882 | Superior | ||
| Orellana, Nicolas | Chile | 1/21/1869 | District | B | 324 |
| Orena, Gaspar | Spain | 9/9/1861 | District | 413 | |
| Orriss, Herbert Mayo | England | 3/2/1912 | Superior | II | 45 |
| Ortega, Jose Maria | Mexico | 9/5/1865 | County | B | 158 |
| Ortega, Jose Maria | Mexico | 6/29/1867 | District | B | 207 |
| Ortiz, Lino | Mexico | 8/1/1900 | Superior | ||
| Ostermann, Christian A. R. | Germany | 3/21/1899 | Superior | ||
| Ostini, Fedele | Switzerland | 12/6/1913 | Superior | II | 91 |
| Ostini, J. Peter | Switzerland | 12/3/1910 | Superior | II | 10 |
| Ott, Adam | Germany | 8/4/1877 | District | B | |
| Otto, Georg Walther | Germany | 12/7/1898 | Superior | ||
| Ousdal, Osbjorn Pedersen | Norway | 12/3/1915 | Superior | II | 91 |
| Overa, Ole Anderson | Norway | 5/9/1904 | Superior | ||
| Overell, Leonard James | England | 9/7/1917 | Superior | III | 309 |
| Overoie, Lars Silversten | Norway | 7/11/1910 | Superior | II | 2 |
| Owen, William | England | 9/9/1868 | District | B | 265 |
| Paaske, C. M. | Denmark | 8/6/1898 | Superior | ||
| Paaske, Peter Nielson | Denmark | 7/20/1900 | Superior | ||
| Pagliotti, Frank | Italy | 6/16/1919 | Superior | III | 394 |
| Pagliotti, John Matteo | Italy | 12/6/1913 | Superior | III | 159 |
| Paioni, Joseph | Switzerland | 11/15/1909 | Superior | I | 35 |
| Palmquist, Peter E. | Sweden | 9/24/1897 | Superior | ||
| Pappahristu, Angel | Greece | 9/2/1911 | Superior | II | 21 |
| Parker, J. R. | Canada | 2/29/1896 | Superior | ||
| Parma, G. B. | Italy | 6/30/1898 | Superior | ||
| Parsons, Albert L. | England | 7/21/1902 | Superior | ||
| Parsons, Tidal | England | 6/1/1887 | Superior | ||
| Pasinetti, Angelo | Italy | 1/7/1902 | Superior | ||
| Pasquali, Amadio | Italy | 9/1/1916 | Superior | III | 247 |
| Patterson, George A. | England | 9/3/1877 | County | ||
| Pattison, Robert W. | Great Britain | 4/25/1892 | Superior | ||
| Paug, Felipe | Spain | 11/4/1857 | District | 295 | |
| Paulsen, Theodor Emil | Denmark | 9/7/1918 | Superior | III | 339 |
| Peed, John S. | England | 2/18/1890 | Superior | ||
| Pelch, Frank Joseph | Austria | 12/3/1915 | Superior | III | 226 |
| Pellizzari, Angelo Nicola | Italy | 6/6/1918 | Superior | III | 330 |
| Pelucca, Innocente | Switzerland | 8/11/1908 | Superior | I | 17 |
| Pendola, Juan Baptiste | Italy | 7/28/1875 | District | ||
| Penry, Henry | Great Britain | 11/13/1871 | County | B | 28 |
| Pensa, Ambrogio | Italy | 6/1/1917 | Superior | III | 287 |
| Percivel, William | Ireland | 9/3/1878 | County | ||
| Pereira, Jose Charles | Portugal | 6/6/1919 | Superior | III | 388 |
| Perello, Domenico | Italy | 3/2/1908 | Superior | I | 10 |
| Perini, Dominico | Italy | 12/28/1905 | Superior | ||
| Perini, Enrico | Italy | 7/5/1918 | Superior | III | 350 |
| Perini, Fabio | Italy | 3/23/1894 | Superior | ||
| Permasse, Bernard | France | 4/3/1896 | Superior | ||
| Perozzi, Constantine | Switzerland | 8/3/1900 | Superior | ||
| Perozzi, M. | Switzerland | 8/6/1898 | Superior | ||
| Perrin, Edward Oliver | Nova Scotia | 12/3/1910 | Superior | II | 9 |
| Perrott, John | England | 3/18/1884 | Superior | ||
| Perrozzi, Alfonso | Switzerland | 8/30/1895 | Superior | ||
| Peterkin, Harlow | Canada | 9/14/1905 | Superior | ||
| Peterkin, Wiliam Harland | England | 3/1/1894 | Superior | ||
| Peters, George S. | Great Britain | 5/1/1879 | District | ||
| Petersen, Carl William | Denmark | 3/1/1913 | Superior | II | 78 |
| Petersen, Nick | Denmark | 6/1/1917 | Superior | III | 282 |
| Petersen, Peter | Denmark | 3/5/1920 | Superior | IV | 17 |
| Peterson, Charles | Sweden | 3/13/1875 | County | B | 223 |
| Peterson, David | Sweden | 8/3/1875 | District | ||
| Petroponlos, Christ John | Greece | 12/6/1918 | Superior | III | 344 |
| Peyreigne, John Marie | France | 10/14/1919 | Superior | IV | 10 |
| Philip, Andrew | Scotland | 6/2/1916 | Superior | III | 243 |
| Phillips, George Henry Ake | England | 6/5/1902 | Superior | ||
| Phillips, Joseph Crandall | New Brunswick | 4/4/1890 | Superior | ||
| Piantoni, Livio | Switzerland | 9/5/1914 | Superior | III | 192 |
| Piazzi, Umbert De | Italy | 6/9/1902 | Superior | ||
| Piezzi, Augustine | Switzerland | 7/16/1884 | Superior | ||
| Pike, Charles | England | 3/10/1892 | Superior | ||
| Pimental, Joe Cardozo | Portugal | 7/13/1906 | Superior | ||
| Pinana, Massimo | Switzerland | 7/13/1906 | Superior | ||
| Pinana, Walter | Switzerland | 7/7/1902 | Superior | ||
| Pinoli, Alberto Domenico | Italy | 9/7/1917 | Superior | III | 315 |
| Planchet, Joe | France | 7/20/1900 | Superior | ||
| Pomatto, James | Italy | 11/10/1908 | Superior | I | 21 |
| Pomatto, John | Italy | 4/20/1908 | Superior | I | 13 |
| Pomatto, Peter | Italy | 12/2/1911 | Superior | II | 33 |
| Pommier, Emile | France | 8/7/1871 | District | B | 650 |
| Poniatovsky, August M. | Bohemia | 7/11/1900 | Superior | ||
| Porta, Emil | Switzerland | 9/7/1917 | Superior | III | 311 |
| Potier, Eric Bream | England | 12/1/1916 | Superior | III | 267 |
| Poulson, Peter | Denmark | 9/5/1895 | Superior | ||
| Pozzi, Anchise | Switzerland | 11/29/1889 | Superior | ||
| Pozzi, Pietro | Switzerland | 7/24/1888 | Superior | ||
| Pratt, William | Great Britain | 9/3/1861 | District | 411 | |
| Prescott, James Giacomo | Austria | 1/26/1880 | Superior | ||
| Priest, Stephen, Harry | England | 5/10/1886 | Superior | ||
| Pritchard, Charles | England | 9/7/1917 | Superior | III | 306 |
| Purslow, Ernest J. S. | England | 6/17/1893 | Superior | ||
| Pyoter, John | Germany | 9/3/1877 | County | ||
| Querenback, Joseph | Germany | 9/2/1973 | County | ||
| Quintero, Santiago | 10/9/1863 | District | B | 59 | |
| Rae, John George | Scotland | 7/16/1918 | Superior | III | 342 |
| Raffetto, Stefano | Italy | 12/3/1920 | Superior | IV | 26 |
| Ramirez, Jose | Mexico | 8/31/1875 | District | ||
| Ramirez, Juan | Mexico | 9/4/1871 | County | B | 25 |
| Ramsay, Hugh Augustine Robert | England | 5/8/1902 | Superior | ||
| Rasmussen, Hans Jacob | Denmark | 12/5/1919 | Superior | IV | 3 |
| Rathgen, Louis | Denmark | 8/13/1898 | Superior | ||
| Ratti, Albert | Italy | 7/5/1918 | Superior | III | 351 |
| Rayes, Nicola | Syria | 12/3/1915 | Superior | III | 228 |
| Read, George James | England | 7/24/1889 | Superior | ||
| Read, George Wells | England | 9/6/1918 | Superior | III | 365 |
| Read, James | England | 8/24/1889 | Superior | ||
| Reid, William | Scotland | 4/7/1879 | County | ||
| Reil, George | Germany | 4/13/1889 | Superior | ||
| Relles, Mattias | Mexico | 9/3/1861 | District | 411 | |
| Rembert, Eugene Maria | France | 9/4/1865 | County | 155 | |
| Remo, Francisco | Mexico | 6/22/1867 | District | B | 197 |
| Renner, Emile | France | 8/4/1879 | District | ||
| Reuser, Rudolph | Switzerland | 1/3/1906 | Superior | ||
| Reuter, Richard Herman | Germany | 71/6/1917 | Superior | III | 297 |
| Revel, Ulrich | Italy | 9/6/1913 | Superior | II | 96 |
| Reynolds, Michael Joseph | Ireland | 12/3/1920 | Superior | IV | 37 |
| Rezzonica, Luige | Switzerland | 8/8/1898 | Superior | ||
| Rezzonico, Emilio | Switzerland | 6/26/1902 | Superior | ||
| Rezzonico, John | Switzerland | 3/4/1911 | Superior | II | 16 |
| Rheidt, Dominicus | Germany | 4/21/1900 | Superior | ||
| Richards, S. M. | England | 10/11/1879 | County | ||
| Rinesto, Joe | Italy | 6/4/1910 | Superior | I | 41 |
| Ringius, David | Sweden | 3/5/1920 | Superior | IV | 8 |
| Rinman, Sefanias | Norway | 6/4/1915 | Superior | III | 212 |
| Ritchie, Samuel George | England | 9/3/1915 | Superior | III | 223 |
| Rivas, Crecenicio | Mexico | 12/29/1902 | Superior | ||
| Rivas, Dolores | Mexico | 7/26/1902 | Superior | ||
| Rivas, Ramon | Mexico | 3/25/1899 | Superior | ||
| Roberts, Edward David | Wales | 12/7/1901 | Superior | ||
| Roberts, Henry | France | 10/6/1888 | Superior | ||
| Roberts, Moses | Wales | 6/15/1892 | Superior | ||
| Roberts, William Henry | England | 11/2/1900 | Superior | ||
| Robertson, John | Norway | 6/1/1912 | Superior | II | 64 |
| Robinson, Michael | England | 3/4/1890 | Superior | ||
| Robles, Blas Cipriano | Mexico | 9/3/1877 | County | ||
| Robles, Ricardo Dolores | Mexico | 10/25/1888 | Superior | ||
| Rock, Huron | Canada | 3/2/1912 | Superior | II | 37 |
| Rodoni, Pietro | Italy | 6/2/1902 | Superior | ||
| Rodriguez, Jose | 6/29/1867 | District | 207 | ||
| Rodriguez, Loreto | Mexico | 9/4/1871 | County | B | 23 |
| Rolla, Samuel E. | Russia | 8/6/1900 | Superior | ||
| Rork, James | England | 9/9/1868 | District | 265 | |
| Rosenblad, Nanna Eleanora | Sweden | 4/26/1920 | Superior | IV | 12 |
| Ross, James | Scotland | 5/10/1898 | Superior | ||
| Ross, William | Scotland | 7/11/1898 | Superior | ||
| Rossi, Frank | Italy | 12/3/1915 | Superior | III | 215 |
| Rossi, Michele | Italy | 9/6/1913 | Superior | II | 99 |
| Rossi, Vitaliano | Italy | 7/15/1881 | Superior | ||
| Rother, Herman | Gerrmany | 11/10/1882 | Superior | ||
| Rourd, Jose Maria | France | 8/8/1871 | District | 651 | |
| Rowe, George Herbert | England | 7/10/1906 | Superior | ||
| Rowe, Herbert William | England | 8/2/1890 | Superior | ||
| Ruff, Daniel | Germany | 11/16/1901 | Superior | ||
| Ruff, Isadore | Germany | 6/2/1899 | Superior | ||
| Ruff, Joseph | Germany | 1/26/1895 | Superior | ||
| Rumble, R. H. | Great Britain | 8/31/1875 | District | ||
| Rundel, James | England | 7/25/1896 | Superior | ||
| Rupprecht, Anton | Germany | 6/4/1910 | Superior | I | 43 |
| Rusconi, J. | Switzerland | 8/31/1900 | Superior | ||
| Rust, Henry W. | England | 8/23/1898 | Superior | ||
| Rust, William Lepage | England | 3/17/1898 | Superior | ||
| Rustad, John B. | Norway | 8/31/1875 | District | ||
| Rutherford, Andrew | Scotland | 12/1/1894 | Superior | ||
| Rutherford, Frank | Scotland | 12/1/1894 | Superior | ||
| Rutherford, George | Scotland | 7/19/1879 | County | ||
| Rystrom, C. F. | Sweden | 3/28/1876 | District | E | 6 |
| Rystrom, J. F. | Sweden | 8/7/1875 | District | ||
| Ryzner, Vaclav | Austria-Hungary | 6/4/1920 | Superior | IV | 29 |