Cognomen Sou Eu (Sou Eu 
) , in all the world, is an extremely rare family name. The cognomen Sou Eu is habitual in Portugal, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Much less frequently, Sou Eu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sou Eu | Brazil, Portugal |