Leon Belmont

Leon Belmont is a noble knight in 11th century Europe in Castlevania: Lament of Innocence he lost both parents at a very young age, and was knighted at 16. When his dear lady Sara Trantoul was whisked away by the vampire Walter Bernhard he enters the castle grounds unarmed, but is given a whip that is blessed with the power of alchemy by the old man Rinaldo Gandolfi, who lives on the grounds. Using his whip, his magic gauntlet, he enters the castle in hopes to find and rescue his fiancée.

So far, Leon has only starred in a single Castlevania game, Castlevania: Lament of Innocence for the PlayStation 2. However, chronologically, he is the earliest known Belmont in the Belmont clan, living in the late 11th century. Lament of Innocence takes place in 1094 in particular.

Called into action
This section was partially taken from The Castlevania Dungeon.
 * 1094 - Castlevania: Lament of Innocence

Family relations
According to Koji Igarashi's ideal timeline, Leon Belmont is the earliest known member of the Belmont clan, making him the ancestor to all of the later known members of the Belmont clan (this could be changed however, if Igarashi decides to retcon the timeline to accomidate a possible future game taking place even earlier).

Sara Trantoul was Leon's fiancée, but she was captured by the vampire Walter Bernhard and was then bitten by him. Only by sacrificing herself to be entwined with the sacred whip could Walter then be stricken down by Leon. This was how the whip, Vampire Killer, acquired its power.