Clancy Bouvier

Clancy Bouvier is the chain-smoking deceased husband of Jacqueline Bouvier, and father of Patty, Selma, and Marge Simpson. He is of French origin.

Jobs
It was revealed that he was one of the earliest male flight attendants. 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.

Dislike of Homer
Clancy first met Homer when he showed up at the Bouvier home claiming to be Marge's prom date (who was actually Artie Ziff). He was kind and complimentary to Homer, saying that "from what she's told me I'm sure you're a solid citizen". Whether Marge had 'sugar coated' her description of Homer, or she had in fact been describing Artie, is unclear.

It is revealed later that his behavior may have just been common courtesy: When Marge returned home after the prom, she overheard her father stating that "when that Simpson boy showed up it took years off [his] life", to which her mother replied with, "Will you stop? She went with the good one" (referring to Artie).

Non Canon Deaths
The cause or time of his death is undetermined. In an issue of the comic Simpsons Illustrated, Lisa attributes his death to an accident involving a roller coaster, but whether this is canon is unclear. What is known is that his death occurred some time after Marge met Homer and before she married him. He got her a "white-noise machine" to help her deal with his death.

In one Treehouse of Horror episode he was eaten by King Homer at his and Marge's wedding.