Last name Wartiainen (Wartiainen 
) , throughout the world, is a rare cognomen. The last name Wartiainen is characteristic of Finland, where it is quite a rare surname, Norway, where it is a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Wartiainen | Germany, Norway, Finland, United States, Brazil |
| abel wartiainen FI (b. 1836) |
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| j. w. wartiainen Finnish politician and priest, FI (b. 1849) |
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| eliel wartiainen FI (b. 1875) |
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| kerttu wartiainen FI (b. 1896) |
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| kai wartiainen Finnish architect (b.1953), FI (b. 1953) |
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| yvonne wartiainen Norwegian painter (born 1976) (b. 1976) |
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