who are the ancestors of the character?
Father Mickey McFinnigan, mother Thelma, raised by Francis and Thelma Griffin.
Ancestry
Before Peter was born, his mother Thelma went to Mexico City to have an abortion. However, she gave birth during the procedure, and smuggled him home to Providence, Rhode Island, where he spent his childhood. Peter was raised by Francis and Thelma Griffin in the Roman Catholic faith. However, in "Peter's Two Dads", he discovers that his biological father is an Irishman named Mickey McFinnigan. Peter visits Mickey, who initially rejects him. Mickey later accepts him as his son after beating him in the "game of drink" (the game of drink referring to matching shots until one passes out). Mickey is based o
when was family guy cancelled the second time 2002. who were the creators of this show? MacFarlane. who is the main character? Peter Griffin. who is he? He is a fictional character who is married to Lois Griffin and is the father of Meg, Chris, and Stewie. who dubs the speech for this character? Seth MacFarlane.
An Irishman named Mickey McFinnigan is his biological father. UNANSWERABLE An Irishman named Mickey McFinnigan
Peter Griffin Peter Griffin
Ancestry Ancestry
 an Irishman named Mickey McFinnigan However, in "Peter's Two Dads", he discovers that his biological father is an Irishman named Mickey McFinnigan. 
wiki:376462
Peter Griffin [SEP] Ancestry
Before Peter was born, his mother Thelma went to Mexico City to have an abortion. However, she gave birth during the procedure, and smuggled him home to Providence, Rhode Island, where he spent his childhood. Peter was raised by Francis and Thelma Griffin in the Roman Catholic faith. However, in "Peter's Two Dads", he discovers that his biological father is an Irishman named Mickey McFinnigan. Peter visits Mickey, who initially rejects him. Mickey later accepts him as his son after beating him in the "game of drink" (the game of drink referring to matching shots until one passes out). Mickey is based on the friends of MacFarlane's father.