Yes he is famous. Most people know who he is because of his Olympic achievements.
Even though Mark Spitz wore long hair, he is a male.
Marc Spitz represented the US in swimming.
Mark Spitz is famous for winning seven gold medals at the 1972 Summer Olympics.
He won 7 Gold medals in the in the swimming competitions in the 1972 Munich Games, a record held until Michael Phelps won 8 gold medals in the swimming competitions in the 2008 Beijing Games.
No, Nancy Spitz cannot be a brother of Mark Spitz because she is female.