Relatives

Peter's family

Francis GriffinFrancis Griffin (deceased) - Peter's captious Irish Catholic adoptive father. He disapproved of nearly all aspects of his family's lifestyle, dismissing it as lazy and immoral, especially the fact that his son married a Protestant. He put work above everything else. He worked at the Pawtucket mill for sixty years and was briefly the shop foreman at Peter's toy factory. In "Peter's Two Dads", while attending Meg's birthday party, Peter accidentally lands on him, due to his being drunk. During that same episode, he was then taken to a hospital, and he died there, after Dr. Hartman said that his injuries were too severe. His very last words, to Peter, were "You're a fat, stinking drunk!", later he appeared in ghost form to encourage Peter that he could beat Mickey McFinnigan in a drinking contest. Voiced mainly by Charles Durning.

Thelma Griffin ? Ex-wife to Francis and mother to Peter. She is 83 years old, and has gray hair with noticeable wrinkles below her eyes. She has purple earrings and a purple bead necklace. She also wears glasses like her son and husband and is a heavy smoker. Before Francis's death, she divorced him because "she had needs he didn't fill". Voiced By Phyllis Diller

Mickey McFinnigan - Peter's biological Irish father, who had an affair with Thelma Griffin on her vacation to Ireland before Peter was born, as recounted in "Peter's Two Dads". He is the local town drunk, which is quite an honor. He did not believe Peter was his son until Peter challenged him to a drinking contest and won, winning his love and respect. How Peter is then related to Nate Griffin and the other Griffin ancestors remains unexplained.

Nate Griffin - (long deceased) Peter's black ancestor. Originally mentioned in "Peter Griffin: Husband, Father...Brother?". Owned as a slave by Silas Pewterschmidt, he fell in love and secretly had sex with Lois "Laura Bush Lynne Cheney" Pewterschmidt to create an inter-racial family. He and his family fled to Quahog after being discovered by Silas. According to Peter Griffin, he invented the Department of Motor Vehicles as a way of getting back at white people.

Bertram ? (See Also: Stewie Griffin#Bertram) half-brother and nemesis of Stewie, unknown to other Griffin family members aside from Brian.Bertram appears as a spermatozoan in "Emission Impossible", and as a child in "Sibling Rivalry", with the same physical appearance in both episodes. He is fathered by Peter's sperm but was born by a lesbian couple. Voiced by Wallace Shawn. Peter's sperm came to create him when Peter went to have a vasectomy and goes into the donor room, spills all the jars of sperm and refills them with his own sperm.

Lois's family
Pewterschmidt family

Carter Pewterschmidt ? Billionaire industrialist, and owner of U.S. Steel and CNN, the latter of which he won from Ted Turner in a poker game. It was because of Peter, a poker ace at the time, that Carter knew that his opponent was bluffing. Husband to Barbara, father to Lois, Carol, and Patrick. He harbors a deep hatred for Peter.

Barbara Pewterschmidt ? Wife to Carter, mother to Lois, Carol, and Patrick.
Carol Pewterschmidt ? Sister to Lois Griffin and Patrick Pewterschmidt, daughter of Carter and Barbara; she has had nine husbands so far, all of whom left her. She had a baby boy in the episode "Emission Impossible".

Patrick Pewterschmidt - Lois's brother, who was locked away in a mental institution by their parents Carter and Barbara after he walked in on his mother having sex with Jackie Gleason (due to the fact that he gets murderous impulses whenever he is reminded of the celebrity). Voiced by Robert Downey Jr.

Marguerite Pewterschmidt (deceased) ? Great-aunt to Lois Griffin and aunt to Carter. She owned the palatial Cherrywood Manor in Newport (now known to be "America's first presidential whorehouse"), which Lois inherited after her death while paying the Griffins a visit, dropping dead at their doorstep. She shared Carter's revilement of Peter. Voiced by Alex Borstein.

Silas Pewterschmidt (long deceased) - Ancestor of the Pewterschmidt family. One of the first to colonize America. Bartered with Native Americans by holding a knife to a baby's throat, presumably sparing its life in exchange for maize. Owned Peter's ancestor Nate Griffin. Bears an obvious resemblance to his descendant Carter.

Lois Laura Bush Lynne Cheney Pewterschmidt (long deceased) - Silas Pewterschmidt's daughter. Fell in love and started an inter-racial family in secret with Nate Griffin, Peter's black slave ancestor. Fled with her family to Quahog after being discovered by her father. Bears an obvious resemblance to Lois Griffin.

Brian's family
Biscuit (deceased) ? Brian's mother. He was taken away from her when he was a puppy. When she died, her caretakers had her stuffed and turned into an end table. After Brian discovers this, with Stewie, he steals his mother and buries her in a local park.

Jasper ? Brian's gay, flamboyant cousin, known for constantly telling dirty jokes. Self-described "rice queen", married to Ricardo, a "skinny, hairless Filipino boy".Brian roomed with Jasper when he moved to Hollywood to be a writer.[6] He lives in Los Angeles and teaches a dance class at Club Med.He's the only other living anthropomorphic dog that has been seen on the show besides Brian and Todd (not including a brief appearance of several dogs playing poker with Mayor West, one of which talks.)

Ricardo - Jasper's Life Partner; married in "You May Now Kiss the...Uh...Guy Who Receives". He apparently does not speak English and, in a deleted scene for this episode, doesn't even seem to realize that he's getting married to Jasper, being that they're both men.

Dylan Flannigan - Brian's human son, introduced in "The Former Life of Brian". Dylan was born to Brian by an ex-girlfriend. After her relationship with Brian ended and Dylan was born, his mother became poor and overweight and never bothered to raise Dylan who, in turn, became an unruly person. Though he was originally hostile to Brian, after going to live with him and finding common ground with him, (smoking pot), turned his life around and went to live with his mother again so that he may do for her what Brian did for him.

Others
Todd (deceased) - The dog that the Griffin family had before he died and they got Brian. Like Brian, he was anthropomorphic. He lived to the age of fifteen.

Fluffy - Fluffy is an aggressive cat the Griffins bought to replace Brian after he moved out of the Griffin household in "Brian: Portrait of a Dog", though they got rid of him after being unable to cope with his gruff nature.

Seabreeze - The Pewterschmidt family dog, a prize-winning greyhound. Had an affair with Brian in "Screwed the Pooch", but was already impregnated by Ted Turner.

O'Brian - A talking sheep who belongs to Mickey McFinnigan. He strongly resembles (and sounds like) Brian in the same way Mickey resembles and sounds like Peter. Voiced by Seth MacFarlane.