| Ogden, Charles | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Ohl, Christian | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Old, Christian Freddy | (1-whrsreel) | Harvard, MA | Search: Full Last First | |
| Orsment, "John, Jr." | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Orsment, Anna | (2-harvard) | Harvard, MA | Search: Full Last First | |
| Orsment, Anna Morgan | (1-findgrave) | Harvard, MA | Search: Full Last First | |
| Orsment, Asenath | (1-whrsreel) | Harvard, MA | Search: Full Last First | |
| Orsment, Clarissa (Margaret) | (1-whrsreel) | Harvard, MA | Search: Full Last First | |
| Orsment, Lucinda | (2-harvard) | Harvard, MA | Search: Full Last First | |
| Orsment, Margaret | (2-findgrave) | Harvard, MA | Search: Full Last First | |
| Orsment, Nancy | (3-findgrave) | Harvard, MA | Search: Full Last First | |
| Orsment, Sally | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Orsment, Washington | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Orsment, Jr, John | (4-findgrave) | Harvard, MA | Search: Full Last First | |
| Osgood, Abigail | (3-findgrave) | Harvard, MA | Search: Full Last First | |
| Osgood, Seth | (1-harvard) | Harvard, MA | Search: Full Last First | |
| Owen, Samuel | (3-findgrave) | Harvard, MA | Search: Full Last First |