|Alias(es)||Kichwa Tembo (African name)
Gggwggwg (Hebrew name)
|Full name||Peter Löwenbräu Griffin Sr.
(born Justin Peter Griffin)
|Occupation||Employee at the Pawtucket Brewery
Employee at the Happy-Go-Lucky Toy Factory
|Relatives||Lois Griffin (wife)
Meg Griffin (daughter)
Chris Griffin (son)
Stewie Griffin (son)
Thelma Griffin (mother; deceased)
Mickey McFinnigan (biological father)
Francis Griffin (adoptive father; deceased)
Chip Griffin (brother)
Unnamed (twin brother)
Karen Griffin (sister)
Bertram (biological son, deceased)
Peter Griffin Jr. (son; deceased)
|First appearance||"Death Has a Shadow"|
|Last appearance||"A House Full of Peters"|
|Voiced by||Seth MacFarlane
Patrick Stewart ("No Meals on Wheels")
Seth Rogen ("Family Gay")
Peter Löwenbräu Griffin Sr. (born Justin Peter Griffin) is the patriarch of the Griffin family. He is an unconventional 44-year-old overweight, lazy, immature, unintelligent alcoholic Irish-American living in Quahog.
He is married to Lois Griffin (née Pewterschmidt). He is also the father of 18-year-old daughter Meg and sons, teenager Chris and one-year-old Stewie. His pet is a talking 8-year-old dog, Brian, who the family has had since he was a stray.
Peter Löwenbräu Griffin was born in Mexico City, Mexico. His mother, Thelma, was in Mexico getting an abortion; however, during the procedure Peter was born. After his birth, she took Peter back to Rhode Island where he was raised by his mother and adoptive father Francis in the Catholic faith. However, his mother had never filled out his citizenship papers, making him an illegal immigrant. According to his birth certificate, he was born Justin Peter Griffin in Quahog. After Francis' accidental death caused by Peter, Peter discovers his biological father is Mickey McFinnigan, an alcoholic from Ireland.