Last names starting with "O"
- Class of 1999 Genevieve O'brien
- Class of 1970 Maureen Oblachinski
- Class of 1995 Gen Obrien
- Daniel Ogden
- Class of 1981 Jon Ohearn
- Class of 1965 Beverly Oliveira
- Kyle Oliveira
- Michael Oliveira
- Class of 1965 Debbie Olivera
- Emily Oliveria
- Class of 1986 Kevin Oneil
- Class of 1957 Betty Ormerod (now Cordeiro)
- Class of 1976 Joseph Orosz
- Class of 1978 Brenda Orten
- Class of 1966 Glenn Orton
- Todd Orton
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About the Joseph Case High School Alumni Directory
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