Trevor Belmont

Trevor Belmont is Simon's great grandfather in the Castlevania series.

Castlevania II
Trevor made his first appearance in Castlevania II. He has a weapon called the Vampire Hunter. Players can play as him in this game.

Castlevania: Curse of Darkness
Trevor was a secret character and he can only be unlocked at the name in the fashion, @TREVOR.

Other media
Trevor in Captain N was deceased and he was buried and was the only Captain N character to be buried in a cemetary. If you look closely, you can see the words reading "TREVOR BELMONT". His tombstone appeared in Return to Castlevania.