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Jacqueline Bouvier
Jacqueline Ingrid Bouvier (nèe Gurney), is the mother of Marge Simpson, Patty and Selma Bouvier, the wife of the late Clancy Bouvier, and the daughter of Jack Gurney. Her first appearance was in the episode, "Moaning Lisa". She also had a sister named Gladys, who is now deceased. Like all Bouvier women, she is voiced by Julie Kavner. Like her twin daughters, Patty and Selma, she smoked heavily and speaks more raspily than they do. She barely has any voice, she never smiles, except in "Lady Bouvier's Lover", thus seeming largely pessimistic, critical and unsociable. She also seems to disapprove of Marge's marriage to Homer (this, again, is a similarity with Patty and Selma, who share a hatred for their brother-in-law). Her favorite song is Moonlight Serenade by Glenn Miller. Jacqueline was married to Clancy Bouvier until his death. She had a brief romance with Abraham Simpson, Homer's father. However, she broke up with him when she was wooed by billionaire Montgomery Burns, whom she came close to marrying before Abraham's intervention made her decide she was better off alone. She made her last speaking appearance in Lady Bouvier's Lover but returned in Sleeping With the Enemy. In her past she looked just like Marge.


Clancy Bouvier
Clancy Bouvier is the deceased father of Patty and Selma Bouvier and Marge Simpson and the husband of Jacqueline Bouvier. His first appearance was in the episode "The Way We Was". He didn't appear again until "Fear of Flying" where it was revealed that he was one of the earliest male flight attendants. The cause or time of his death is undetermined, (in a comic in an issue of Simpsons Illustrated, Lisa attributes his death to an accident involving a roller coaster, but whether this is canon is unclear). Homer got Marge a "white-noise machine" to help her deal with her father´s death. At some point he also served in the United States Navy where he picked up a swearing problem, which nearly cost him his job as a Baby Photographer. As shown in "The Way We Was", he did approve of his youngest daughter Marge's relationship with Homer Simpson and commented later after meeting him; "You know, when that Simpson boy showed up, it took years off my life." To which Jacqueline replied with, "Will you stop? She went with the good one."

http://en.wikipedia.org/wiki/Bouvier_family#Jacqueline_Bouvier