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See also: Special:Categories/Sean O'Brien, Special:PrefixIndex/Category:Sean O'Brien and all pages with titles containing “Category:Sean O'Brien”
Sean O'Brien may refer to:
- Sean O'Brien (born 1984-), windsurfer from Australia;
- Sean O'Brien (born 1987-), rugby union player from Ireland.
- Sean O'Brien (born 1952), writer from England