- Angela Hewitt , Canadian pianist
- Carl Hewitt , US scientist
- Dennis George Wyldbore Hewitt , English recipient of the Victoria Cross
- Foster Hewitt , Canadian radio pioneer
- Gavin Hewitt , BBC journalist
- Hugh Hewitt US radio talk show host
- James Hewitt, 1st Viscount Lifford
- James Hewitt , lover of Diana, Princess Of Wales
- Jennifer Love Hewitt , US actress
- Lleyton Hewitt , Australian tennis player
- Patricia Hewitt , UK politician
- Peter Cooper Hewitt , US electrical engineer
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