Sewanhaka HS Alumni List 
Last names starting with "O"
Select letter of last name to filter the alumni list
Registered Alumni
All Alumni
- Daniel O'boyle
- Class of 1965 Denise O'connor
- Class of 1981 Peter O'Connor
- Class of 1965 Denise O'connor Drescher
- Class of 1947 Vincent O'sullivan
- Class of 1974 Daniel OBoyle
- Class of 1946 Gloria OBrien
- Class of 1952 Harry OBrien
- Class of 1973 Marie OBrien
- Class of 2007 Marcus Obryant
- Kevin Ocampo
- Class of 1961 James Oconnor
- Class of 1976 Therese OConnor
- Barbara Oechsnar
- Barbara Jean Oecshne
- Ronald Oeller
- Class of 1954 Al Oerter Famous
- Mabel Oestrich
- Class of 1968 Christine Oetlieb
- Class of 1976 Beth Ann Ogden
- Class of 1959 Lois Olberter
- Class of 1995 Denise Oliver
- Class of 1960 Joseph Oliveri
- Patricia Olmstead
- Class of 1969 Terence Olmstead
- Class of 1979 John Olsen
- Class of 1967 William Olsen
- Larwence Olson
- Lawrence Olson
- Giuseppe Oppedisano
- Class of 1989 Maria Oppedisano
- Class of 1966 Peter Oppedisano
- Class of 1989 Carlo Oquendo
- Class of 1954 Al Order
- Class of 2012 Joann Orduna
- Class of 1997 Charles Oreilly
- Kieran OReilly
- Class of 1975 Camille Orlando
- Class of 1971 Jean Orlando
- Class of 1978 Jack Oropallo
- Class of 1970 Michael Ororeke
- Steven Orozco
- Class of 1960 Richard Orr
- Ana Ortega
- Class of 1970 Bertha Ortega
- Barbara Ossman
- Frederick Ostrander
- Class of 1964 Nancy Ostrovski
- Class of 1984 David Otero
- Class of 1965 Joseph Otrolano
- Class of 1960 William Ottesen
- Class of 1965 Neal Owens
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About the Sewanhaka High School Alumni Directory
If you attended Sewanhaka High and want to be added to the alumni directory register now to add your name to the alumni list. For former Sewanhaka High students from NY, you can view the class reunion information that has been posted by other site visitors. In addition, we encourage you to post your profile in the alumni directory, share information about the school activities you were involved with and reconnect with Sewanhaka High School alumni.
School's Address:
500 Tulip Ave
Floral Park, New York 11001
500 Tulip Ave
Floral Park, New York 11001
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