Whittet is a Scottish surname most frequently found in Perthshire and Angus. It is a variant of Whitehead. Other variants include Whiddett.

Notable people with the name include:

John Whittet (1925–1989), U.S. Navy officer. Lawrence C. Whittet (1871–1954), American politician. Brendan Whittet (born 1971), American ice hockey coach. Thomas Douglas Whittet (1915–1987), a British pharmacist and former president of the History of Medicine Society.

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