William O'Sullivan
William O'Sullivan may refer to:
- William S. O'Sullivan (1928–1971), Irish-American loanshark and mob enforcer
- William O'Sullivan (politician), Irish Cumann na nGaedheal politician
- Billy O'Sullivan (born 1968), Irish hurler
- Billy O'Sullivan (footballer) (born 1959), English former footballer
See also
This disambiguation page lists articles about people with the same name.
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