Thank you for the (background) information! I had also already found this one site about Brazilian name customs, but I didn't find the information on it clear enough:
http://www.soccerpulse.com/forum/lofiversion/index.php/t32023.html
Do you happen to know a good, reliable website about Brazilian names? It can even be in Portuguese, because I can understand some of it (I prefer English, however). It would be much appreciated. :)