John Gillen may refer to:
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John Gillen (judge)
Sir John Gillen, PC (born 18 November 1947), previously known as The Rt Hon Lord Justice Gillen, and before that as Mr Justice Gillen, is a Privy Councillor and was one of the Lords Justices of Appeal of Northern Ireland, from September 2014-No ...
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John Gillen (American football)
{{hndis, Gillen, John