Peter Griffin is an overweight Irish Catholic, blue collar worker with a prominent Rhode Island and Eastern Massachusetts accent. He's the husband of Lois and the father of Meg, Chris and Stewie.n He is the son of Thelma Griffin and Mickey McFinnigan, and is the step-son of Francis Griffin. Peter and the rest of the Griffins live in the fictional town of Quahog, Rhode Island which is modeled after Cranston, Rhode Island.