Cognomen Constaín (Constaín 
) , globally, is a very rare family name. The family name Constaín is habitual in Latin America and the Caribbean, particularly Colombia, where it is a very rare surname.
| silvia constaín Colombian politician, CO (b. 1901) |
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| juan esteban constaín Colombian writer, CO (b. 1979) |
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| sylvia constaín CO (b. 1971) |
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