Last name Haataja (Haataja 
) , throughout the world, is quite a rare surname. The family name Haataja is characteristic of Finland, where it is quite a common surname, British Virgin Islands, and Sweden, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Finland, the United States, and Sweden.
| VARIANT | COUNTRY |
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| Haataja | Sweden, Australia, Finland, Hungary, United States |
| jaakko haataja Finnish poet, FI (b. 1846) |
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| kyösti haataja Finnish politician (1881-1956), FI (b. 1881) |
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katherine haataja Finnish-Swedish mezzo-soprano and entrepreneur, SE (b. 1969) |
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| johannes haataja Finnish professor, FI (b. 1928) |
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| hans haataja Finnish film director, FI (b. 1932) |
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juha-pekka haataja Finnish ice hockey player, FI (b. 1982) |
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| paul-erik haataja Finnish writer, FI (b. 1944) |
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| lauri haataja Finnish historian (1947-2012), FI (b. 1947) |
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| kristina haataja Finnish journalist, FI (b. 1953) |
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| steven p. haataja Ph.D. University of Nebraska-Lincoln 2006 (b. 1960) |
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| teemu haataja Finnish pesäpallo player, FI (b. 1974) |
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| samuli haataja Finnish musician, FI (b. 1976) |
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| leena haataja researcher (ORCID 0000-0002-8057-6194) |
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| arttu haataja Finnish futsal player, FI |
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| mikko p haataja researcher (ORCID 0000-0001-8459-7331) |
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