All over the world, Tatja (Tatja 
, Татіа 
) is a very rare feminine forename. The forename Tatja is habitual in Northern Europe, particularly Finland, where it is a rare girly name. Much less frequently, Tatja is the last name as well as the forename.
| tatja seibt PL (b. 1944) |
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| tatja hirvikoski researcher ORCID ID = 0000-0003-1824-3003 (b. 1970) |
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| tatja karvonen Finnish politician, FI (b. 1974) |
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| tatja kostnapfel SI |
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| tatja claessen |
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