Surname Cosín (Cosín 
) , around the world, is a very rare family name. The last name Cosín is habitual in Southern Europe, particularly Spain, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Cosín | Spain |
| juan manuel martínez cosín ES (b. 1925) |
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| diego cosín Argentinian actor, AR |
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| darío j. díaz cosín Spanish annelidologist |
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| jaime cosín researcher |
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