Creator
- Ochs family1
- Office of the President4
- Office of the Vice President for Administration1
- Offley, Cleand Nelson, 1869-19301
- Offley, David, d. 18381
- Offley, Edward Murray1
- Offley, John Holmes, 1802-18451
- Offley, John Marbury, 1877-19321
- Offley, Robert S.1
- Ogden family1
- Ohio County Court1
- Olds, Lewis P.1
- Orum family1
- Osborne, Logan1
- Osborne, Mary P., Collector1