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Mr. Olsen, also known as Grandpa Olsen is or was the father of Mona Simpson and the husband of Mrs. Olsen. He is the maternal grandfather of Homer Simpson, the paternal great-grandfather of Bart Simpson, Lisa Simpson, and Maggie Simpson, and also the grandfather-in-law of Marge Simpson. He did not approve of Mona's relationship with Abe. He was thought to be still alive by his grandson Homer but that is unclear.[2]

Appearances

Citations

  1. The Winter of His Content
  2. The Winter of His Content
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