Klaus Mikaelson

Niklaus Mikaelson more commenly know as Klaus or Nik is an Original vampire and a werewolf, making him the Original Hybrid.

Klaus is the biological son of Ansel and Esther Mikaelson, the step-son of Mikael, and nephew of Dahlia. Klaus is the maternal younger half-brother of Freya, Finn, Elijah, and the maternal older half-brother of Kol, Rebekah and Henrik Mikaelson. Klaus is the uncle of Freya and Keelin's son, Nik. Klaus is the father of Hope, whose mother is Hayley, the father of Ash, Henry and Lexi, who are all Caroline Forbes's children, and the adopted father of Marcel Gerard, an orphan boy he rescued and eventually turned into a vampire.

He is through Ash, the maturnal grandfather of Jax, Max and Kate Mikaelson.