Surname Reinaas (Reinaas 
) , all around the world, is a rare family name. The family name Reinaas is habitual in Estonia, where it is quite a rare surname, Norway, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Reinaas | Norway, Estonia, United States |
| henrik reinaas Norwegian farmer and politician (1826-1898), NO (b. 1826) |
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marek reinaas Estonian entrepreneur, EE (b. 1971) |
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