Cognomen Tiitu (Tiitu 
) , all over the world, is a very rare surname. The last name Tiitu is characteristic of Finland, where it is quite a rare surname, the United States, where it is an extremely rare surname, and India. Much less frequently, Tiitu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tiitu | India, Finland, United States |
| kustaa tiitu Finnish farmer and politician, FI (b. 1896) |
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tero tiitu Finnish floorball player, FI (b. 1982) |
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tiitu takalo FI (b. 1976) |
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| tiitu kemppainen FI |
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| saara tiitu Finnish pesäpallo player, FI (b. 1995) |
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