Robert or Roberto
A little research I have conducted with a couple of articles, shows that the katakana for Robert is ロバート,as shown here, similar to Robert Katze, and for Roberto, it's ロベルト.
Famous people like Robert E. Lee, has the same Katakana for Robert as the character. While famous Robertos, such as Roberto Clemente and Roberto Carlos da Silva carry the same katakana, which is romanized as Roberuto.
I'm unsure about the surname though.---TheGreatEye 04:08, December 12, 2011 (UTC)
He's of Hispanic descent. Roberto sounds very probable. Mr.Kyon 04:29, December 12, 2011 (UTC)