Cognomen Cosin (Cousin 
, Cosin 
, Cugino 
) , in the entire world, is a common last name. The last name Cosin is characteristic of Guadeloupe, where it is quite a common surname, France, and Malta. In absolute terms, it most frequently occurs in France, the United States, and Belgium. Very seldom, Cosin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cousin | United Kingdom, Belgium, Spain, United States, France |
| Cosin | United Kingdom, Spain, Nigeria, United States, France |
| Cugino | Germany, United States, Canada, France, Brazil |
| Cosyn | Germany, Belgium, Spain, United States, France |
| richard cosin English politician (b. 1501) |
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john cosin English churchman, GB (b. 1594) |
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| lionel zelick cosin English geriatrician, GB (b. 1910) |
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| virginia cosin Venezuelan writer, VE (b. 1973) |
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| catharina cosin German | Engraver, Muralist, Painter |
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| johannes cosin Abbot of the Benedictine Abbey of St. Mauritz und Simeon, Minden |
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| charlotte cosin researcher |
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| darío j. diaz cosin researcher, ES |
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| virginia cosin |
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| anne cosin |
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