I think it depends on the tone of the story and character.
If it's supposed to be over-the-top caricature and funny -
Vidal
If it's serious and we're supposed to like him -
Leandro,
Alexandre
If he's actually good but we're supposed to mistrust him at first -
Darius,
Adrian,
Corbin
If he's a bad guy -
Demetrius
If it's a fantasy novel like with dragons and magic (there could be dragons and magic in France-Brazil) -
Theron
If he's a cowboy -
Blaise,
Micah,
Sage,
Ephraim,
Gideon
If he's a vampire -
Jeremiah (I just really want there to be a sexy biracial vampire named
Jerry in the world)