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Harold Lorrenzo Olsen (1843 - 1925) was the paternal great-great-great-grandfather of Lisa Simpson, Bart Simpson and Maggie Simpson. The father of Jordan Olsen, the paternal grandfather of Bjorn Olsen. the paternal great-grandfather of Mona Simpson and Karl Olsen. and the maternal great-great-grandfather of Homer Simpson. He is one of the earliest known Olsen ancestors recorded. besides his great-great-great-grandfather Emanuel.
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