Cognomen Os (Os 
) , around the world, is a common last name. The family name Os is characteristic of Netherlands, where it is quite a common surname, Norway, and Saudi Arabia, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Indonesia, Netherlands, and Egypt. Much less frequently, Os is the forename as well as the last name.
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| Os | Indonesia, Saudi Arabia, Egypt, Myanmar, Netherlands |
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trofimos a Christian who accompanied Paul during a part of his third missionary journey, TR (b. 50) |
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| heliodoros ancient Greek sculptor (b. 200) |
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pieter van os Dutch historian and arts patron (b. 1467) |
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| peter van os (b. 1460) |
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dirck van os Dutch merchant, NL (b. 1556) |
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| catharina van os 1643- (b. 1643) |
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jan van os painter from the Northern Netherlands (1744-1808), NL (b. 1744) |
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pieter gerardus van os painter from the Northern Netherlands (1776-1839), NL (b. 1776) |
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| anthonie van der os (b. 1722) |
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george jacobus johannes van os painter from the Northern Netherlands (1782-1861), NL (b. 1782) |
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| willibrord van os NL (b. 1744) |
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pieter frederik van os Dutch painter (1808-1892), NL (b. 1808) |
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| george jacobus johannes van os painter from the Northern Netherlands and nephew of Georgius van Os (1805-1841), NL (b. 1805) |
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| rosa van os (1824-1889) (b. 1824) |
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edvard os Norwegian officer, author (1885-1970), NO (b. 1885) |
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