Marie Belmont, Zoe Belmont, Delores Belmont, Leon Belmont, Soleiyu Belmont, Sonia's grandfather. some think its debatable whether juste fought the "real" dracula or just a "false" dracula
reinhardt is a belmont, in development his name was originally "schneider belmont"
next question: who's "favorite activity" is castlevania 2095?
hint: its not a hero in a half-shell
I don't think this is the correct answer as EstebanT's question can be interpreted in a variety of ways.
The correct literal answer to his question would be "Every single Belmont, including wives, brothers, and those who never got hold of the Vampire Killer".
I think he meant "canon" Belmonts who are playable, and got to the end of the game, and in this case Marie Belmont, Zoe Belmont, Delores Belmont, Soleiyu Belmont, Sonia's grandfather do not count, since some are not canon, others are supporting characters and one is a boss. That's also why I kept Reinhardt questionable.