Cognomen Steffensen (Steffensen 
, ステフェンセン) , in the world, is quite a common family name. The family name Steffensen is habitual in Northern Europe, particularly Denmark, where it is quite a common surname, Norway, and Latvia, where it is quite a rare surname. In absolute terms, the name is most common in Denmark, Norway, and the United States.
| VARIANT | COUNTRY |
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| Steffensen | Australia, Denmark, Germany, Norway, United States |
Stefanson, Stefansson, Stefánsson, Stephensen, Stephenson, Стефенсон, Стивенсон, ستيفنسون, สเตฟเฟนเซ่น, and スティーブンソン
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karl steffensen German philosopher (1816-1888), DE (b. 1816) |
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hans christian steffensen Danish politician (1837-1912) (b. 1837) |
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| asmus steffensen DE (b. 1783) |
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| heinrich jürgen steffensen DE (b. 1814) |
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| elise steffensen (b. 1820) |
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ingeborg steffensen Danish opera singer and singer, DK (b. 1888) |
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| steffen olai steffensen Norwegian politician (b. 1842) |
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| marie steffensen DK (b. 1859) |
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| johan frederik steffensen Danish mathematician, DK (b. 1873) |
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| poul steffensen DK (b. 1866) |
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| jens steffensen Danish merchant (1881-1962) (b. 1881) |
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| wilhelm steffensen gymnast, NO (b. 1889) |
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| signe steffensen (b. 1881) |
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| jens olai steffensen Norwegian politician (1891-1961) (b. 1891) |
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| elísabet steffensen IS (b. 1882) |
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