Last names starting with "O"
- Class of 1967 Mary O'Connor (now Bryant)
- Class of 1978 Mark Obergfell
- Class of 1980 Doug OBrien
- Class of 1997 Katie Obyc
- Class of 1965 David Ochsenbein
- Carene OConnor
- Wendy Ogalve
- Wendy Ogalvie
- Class of 2005 Caitlin Ohara
- Class of 1980 Patty Okelley
- Class of 1991 Michael Olaughlin
- Class of 1984 Cassie Oloughlin
- Class of 1991 Jennifer Oneil
- Class of 1994 Jackie Onyejwe
- Class of 1993 Ryan Orewiler
- Class of 1996 Pat Ortlieb
- Class of 1966 Nina Osborn
- Class of 1971 Gerald Oshaugnessy
- Class of 1975 Jerry Oshaugnessy
- Loretta Osullivan
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About the Bishop Watterson High School Alumni Directory
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