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Sylvester "Fester" Olsen is a member of the Simpson family. He is mentioned by Bart when Colby Krause records Homer Bart ask Homer if Uncle Fester is still alive asking if Colby is recording and saying no. Homer slaps Bart on the back of the head in anger. He is most likely Mona's brother, making him Homer's maternal uncle, Bart, Lisa, and Maggie's paternal granduncle, and the uncle-in-law of Marge.


Appearances

Simp.jpg Episode – "He Loves to Fly and He D'ohs" (Mentioned)

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