Cognomen Kaptain (Kaptain 
) , across the world, is a rare surname. The last name Kaptain is characteristic of Denmark, where it is quite a rare surname, Germany, where it is a rare surname, and the United States, where it is a very rare surname. Likewise, Kaptain is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kaptain | Germany, Egypt, Ghana, United States, Denmark |
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johannes kaptain German politician (1926-1998), DE (b. 1926) |
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| dave kaptain Illinois mayor; chemist, US (b. 1940) |
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| laurence kaptain American symphonic cimbalom artist, US (b. 1952) |
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| anna vinther kaptain Danish association football player |
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| rina juel kaptain researcher |
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| kirsten kaptain researcher (ORCID 0000-0003-3813-2837) |
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