Cognomen Parnaíba (Parnaíba 
) , in the world, is an extremely rare surname. The family name Parnaíba is habitual in Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Parnaíba | Brazil |
| parnaíba paoliello BR (b. 1908) |
|