| Estate of | Number | I/W | Administrator or Executor | Will | Record |
| Book | Page | ||||
| O'Bannion, Garrett | 501 | I | William Cross | ||
| O'Bannion, George M. | 500 | I | Z. W. Flynn | ||
| Oberman, Mary Josephine | 58-293 | W | O. Everett Gibbs & H. Scott Gordon | X | 276 |
| Obermeyer, Albert F. | 9087 | W | Mary Josephine Obermeyer | R | 360 |
| Obermeyer, Anton B. | 8273 | W | Albert Everett Obermeyer | P | 392 |
| Obermeyer, Charles A. | 5629 | I | Myrtle Obermeyer | ||
| Obermeyer, John A. | 5307 | I | F. E. Farrell | ||
| Obert, Olive | 55-408 | I | Ruth Burrus | ||
| Obertate, Ida P. | 62-211 | I | George P. Obertate | ||
| O'Brian, John | 4597 | W | Margaret O'Brien | J | ??? |
| O'Brien, Margaret | 7109 | W | Anna Kiley | O | ??? |
| O'Brien, Morris | 502 | I | Mary O'Brien | ||
| O'Brien, Patrick | 5917 | I | John O'Brien | ||
| O'Brien, Patrick | 9290 | W | J. V. Kennedy (Exc.) & Irene Kennedy (Adm) | R | ??? |
| O'Connell, John | 4473 | W | Thomas O'Connell | H | ??? |
| O'Donnell, John | 55-238 | W | Emma O'Donnell | V | ??? |
| O'Donnell, L. Frank | 8940 | I | G. E. Spencer | ||
| O'Donnell, Maurice | 4149 | W | Johanna Lockman | H | ??? |
| O'Donnell, Michael | 2200 | W | DeCondray Green | C | ??? |
| Officer, William | 503 | I | H. H. Massey | ||
| Ogden, Lou | 7875 | I | P. G. Stein | ||
| Ogle, Absolam | 2202 | I | John W. Ogle | ||
| Ogle, Charles | 505 | I | D. Rockwell et al | ||
| Ogle, Elizabeth J. | 6180 | W | John J. Ferry | N | 84 |
| Ogle, Harry | 7412 | I | Mary O. Liter | ||
| Ogle, Hattie S. | 7046 | W | Walter F. Ogle | N | 567 |
| Ogle, Howard L. | 5715 | I | John B. Ogle | ||
| Ogle, John B. | 8167 | W | Mary Liter | O | 58 |
| Ogle, John W. | 3582 | I | S. Allen Fairbank | ||
| Ogram, A. J. | 6347 | I | Homer H. Potter | ||
| O'Hara, Thomas | 7047 | W | Edward T. White | N | ??? |
| O'Keefe, Mary | 5497 | I | Clyde Cooper | ||
| O'Keefe, Patrick | 2203 | I | James D. O'Keefe | ||
| Oldroyd, Sidney | 2204 | I | William Warters | ||
| Olds, Daniel | 504 | I | J. L. McConnell | ||
| Olds, Mary A. | 9546 | I | Rhoda E. Samoore | ||
| Olenslayger, Louis | 672 | W | Minnie S. Barr | T | 339 |
| Olive, Elizabeth | 505 1/2 | I | Richard Richards | ||
| Oliver, Ben A. | 62-28 | I | John E. Oliver | ||
| Oliver, Christopher C. | 8760 | I | Ella Pearl Scott | ||
| Oliver, Domingas D. | 4150 | I | C. C. Oliver | ||
| Oliver, Martha Capps | 5148 | W | Charles C. & Emma Capps | K | 554 |
| Oliver, Nelson | 3282 | I | D. Rees Browning | ||
| Oliverson, Cecilia | 59-76 | W | Leo J. Clancy | X | 456 |
| Oliverson, Flora | 411 | I | Cecilia Oliverson | ||
| Oliverson, Isabelle | 57-178 | W | Leo J. Clancy | W | 436 |
| Oliverson, Joseph | 8361 | W | Elliott State Bank | P | 285 |
| O'Loughlin, Joseph F. | 4151 | I | L. O. Vaught | ||
| Olroyd, Alva Etta | 54-102 | I | Burton Olroyd | ||
| Olroyd, W. J. | 57-354 | W | Myrtle Olroyd | W | 474 |
| Olsen, O. M. | 7704 | W | Mabel U. Olsen | O | 391 |
| Olson, Harry W. | 9676 | I | Mary Jane Olson | ||
| O'Meara, Birdie A. | 58-136 | W | Catherine A. O'Meara | X | ??? |
| O'Meara, David J. | 4376 | I | Edward O'Meara | ||
| O'Meara, Edwad H. | 57-297 | I | Mary T. O'Meara | ||
| Ommen, Detrich | 2205 | I | Herman Ommen | ||
| Ommen, Emma C. | 59-325 | W | Bernard Uhnken | Y | 108 |
| Ommen, Herman F. | 8884 | W | Laura Ristner & Archie A. Ommen | R | 117 |
| Ommen, Herman F. | 61-156 | W | Olga Ommen | Z | 102 |
| Ommen, Jacob D. | 9474 | W | Edwin Ommen & Alpha J. Ommen | S | 286 |
| Ommen, Jacob H. | 4687 | W | Herman F. Ommen | J | 408 |
| Ommen, Melvin R. | 573 | I | Velma R. Ommen | ||
| Ommen, Omme J. | 3122 | W | Jacob D. Ommen | F | 133 |
| Oneal, Miriam | 2207 | I | George W. Moore | ||
| Oneal, Patrick | 506 | I | William McAvoy | ||
| Oneal, Thomas | 2206 | W | John C. Oneal | C | 422 |
| O'Neal, William M. | 9509 | W | Dorothy C. O'Neal | S | ??? |
| Onken, Gustav | 8274 | W | Minna D. Onken | Q | 28 |
| Onken, John | 9020 | W | Amy Burnham Onken & Harry Kuby Onken | R | 341 |
| Opperman, Elizabeth | 4152 | I | Sophia Opperman | ||
| Opperman, Herman | 6338 | W | Laura Opperman | N | 91 |
| Opperman, Laura Ann | 62-114 | W | Bertha M. O'Connor | Z | 328 |
| Opperman, Margarette | 55-224 | W | Bertha K. Mason | T | 524 |
| Ore, Calvin | 5086 | W | Nelson Ore | K | 397 |
| Ore, Sarah J. | 8541 | I | Carl Ore | ||
| Ore, Thomas Nelson | 55-435 | W | Harold Franklin Ore, & Dorothy Parlier | W | 20 |
| Ore, William robert | 4610 | I | Sarah J. Ore | ||
| Orear, Franklin | 5241 | I | George J. Orear | ||
| O'Rear, George | 2198 | I | F. Orear & J. M. Dunlap | ||
| Orear, Nettie | 5295 | W | Charles B. Graff | L | 189 |
| Orear, Sallie B. | 5224 | W | Julian P. Lippincott | K | 548 |
| O'Rear, Sarah | 2199 | I | F. Orear & J. M. Dunlap | ||
| Orear, Thomas B. | 5531 | I | Arminta Dunlap | ||
| O'Rear, William | 2201 | W | B. F. Beesley | C | ??? |
| O'Reilly, Patrick | 6336 | I | J. J. Kelly | ||
| Ornellas, F. Antonio | 2208 | I | John Ornellas | ||
| Ornellas, Joquina | 4598 | W | E. M. Vasconcellos | J | 100 |
| Ornellas, Mamie | 9441 | I | John D. Ornellas | ||
| Ornellas, Mervin De | 6547 | I | John W. De Ornellas | ||
| Ornellas, Phinia B. | 60-66 | W | Noah Ornellas | Y | 212 |
| Ornellas, Rachel M. | 9488 | W | Rose Schuetze | R | 458 |
| Orr, Francis M. | 2209 | I | George R. Fox | ||
| Orr, James | 508 | I | Henry Lee | ||
| Orr, Louise DeSilva | 8902 | W | Charles Smith | R | 278 |
| Orr, Mollie H. | 62-173 | I | James K. Orr | ||
| Orr, Peter | 407 | I | Robert Dinsmoore | ||
| Osborn, Olive S. | 58-200 | W | Elliott State Bank | X | 213 |
| Osborne, Anna B. | 60-297 | W | Marcy W. Osborne | Y | 471 |
| Osborne, Daisy Rayhill | 8581 | W | Samuel Osborne | O | 359 |
| Osborne, Eliza C. | 5340 | I | Cora E. Hart | ||
| Osborne, Elizabeth | 5085 | W | J. M. Metcalf Et al | J | 538 |
| Osborne, Emma | 136 | W | Gail B. Ranson | U | 208 |
| Osborne, Georgia L. | 7946 | W | Charles A. Johnson | P | 183 |
| Osborne, Harrison W. | 2210 | W | J. W. & B. S. Osborne | D | 242 |
| Osborne, Harvey U. | 8359 | W | Augusta N. Osborne | Q | 10 |
| Osborne, Henry B. | 172 | W | H. Russell Osborne | U | 217 |
| Osborne, Henry C. | 8927 | W | Elliott State Bank | R | 237 |
| Osborne, Ina M. | 60-274 | W | H. Russell Osborne | U | 217 |
| Osborne, James C. | 5212 | W | Hy C., Jno. N. & James E. Osborne | K | 413 |
| Osborne, John N. | 6414 | I | Ira P. Story | ||
| Osborne, John W. | 7703 | W | I | 370 | |
| Osborne, Martha A. | 5781 | W | Charles A. Osborne | L | 272 |
| Osborne, Mary A. | 7945 | W | Elliott State Bank | P | 96 |
| Osborne, Robert T. | 2211 | I | Samuel B. Osborne | ||
| Osborne, Samuel D. | 3918 | W | Lillian W. Osborne | H | 399 |
| Osborne, Stella S. | 5200 | I | Georgia L. Osborne | ||
| Osborne, W. T. | 6291 | I | C. F. Wemple | ||
| Osborne, William E. | 5780 | I | J. E. Osborne & Charles Sullivan | ||
| Osborne, William H. | 805 | I | Mae Osborne | ||
| Osgood, H. D. | 2212 | W | John Berry | C | 462 |
| Osterholdt, Edward | 171 | I | Elsie O. Redburn | ||
| Osterholt, August | 3726 | I | Kate M. Osterholt | ||
| Osthoff, Frederick | 509 | I | C. C. Foster | ||
| Oswald, Emma R. | 8816 | W | F. C. Fitzsimmons | Q | 34 |
| Oswald, Joseph | 5013 | I | J. Weir Elliott | ||
| Owen, William C. | 3283 | W | Wm. W. Robertson | F | 352 |
| Owens, George Samuel | 9000 | I | Ada E. Owens | ||
| Owens, Harriett | 4375 | I | Jesse D. Lake | ||
| Owens, John | 7161 | I | Herbert A. Owens | ||
| Owens, Mary Ellen | 9947 | I | Robert G. Owens | ||
| Owens, Russell V. | 9710 | I | Esther A. Beauchamp | ||
| Owings, Lillian B. | 5496 | I | Charles H. Gibbs | ||
| Owings, Mordica | 510 | W | Susannah Owings | A | 131 |
| Owings, Susannah | 511 | I | Absalam Peak | ||
| Oxley, Alice Emma | 59-370 | W | Hyman Oxley | Y | 160 |
| Oxley, Annie J. | 810 | I | Lawrence T. Oxley | ||
| Oxley, George W. | 8360 | W | B. F. Wilson (Adm) | Q | 142 |
| Oxley, James | 3123 | W | Mary & J. E. Oxley | F | 10 |
| Oxley, Mary | 4692 | I | Edgar S. Oxley | ||
| Oxley, Nellie S. | 8505 | I | Charles E. Criswell | ||
| Oxley, Richard B. | 9151 | W | Coila W. Oxley | R | 118? |
| Oxley, Thomas | 386 | W | Cecil R. Oxley | S | 216 |
| Oxley, William A. | 5461 | W | John W. Oxley | L | 456 |