Last name Machaín (Machaín 
) , in all the world, is a rare cognomen. The surname Machaín is characteristic of Latin America and the Caribbean, particularly Paraguay, where it is quite a rare surname, and Uruguay, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Machaín | Uruguay, Paraguay |
|
facundo machaín recalde breifly the President of Paraguay in 1870, PY (b. 1845) |
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| gustavo machaín Uruguayan association football player, UY (b. 1965) |
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| humberto álvarez machaín Mexican physician, MX |
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