Surname Sidnéa (Sidnéa 
) , in all the world, is an extremely rare cognomen. The surname Sidnéa is habitual in Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname. More prevalently, Sidnéa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sidnéa | Brazil |