Carter Pewterschmidt

Carter Pewterschmidt is the father of Lois Griffin and the father-in-law of Peter Griffin. He appears briefly in Lois' Affair, where he refuses to let Chris Griffin visit his father in prison.

Trivia

 * It's possible that Carter may be going senile, as he was completely oblivious to what was going on in Meg's bedroom, even as Chris was punishing her.