Lamech

Lamech was the son of Methushael in the line of Cain. He had two wives, Adah and Zillah. With Adah he fathered Jabal and Jubal. With Zillah he fathered Tubal-cain and a daughter named Naamah. Let it also be noted that in a poem to his wives, Lamech admits to killing a man and expected to be cursed for it.