Family name Tammearu (Tammearu 
) , throughout the world, is a rare surname. The last name Tammearu is habitual in Estonia, where it is quite a common surname, Finland, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tammearu | Finland, United States, Estonia, Canada |
| peeter tammearu Estonian actor, EE (b. 1964) |
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| kuno tammearu Estonian state official, head of Estonian Rescue Board, EE (b. 1974) |
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| märt tammearu Estonian volleyball player, EE |
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