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- Terry Allen, several people
- Tessa Allen (born 1996), an American actress
- Tim Allen (born 1953), American actor
- Timothy Allen (b.1971), English photojournalist
- Timothy F. H. Allen (b.1942), British botanist
- Thomas Allen, several people
- Tom Allen (born 1945), American politician
- Tommy Allen, several people
- Toussaint Allen (1896-1960), American negro league baseball player
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