Cain, the wanderer

Cain (Cainin) son of Adam and Eve, a farmer who in life abhored the spilling of blood, until God chose his brother over him, and in a fit if jealous rage killed his brother Able. . . making him the first murderer. As punishment, God cursed Cain to wander for all eternity, and to sustain himself on the blood of his fellow man, turning him into the first vampire.