Characters who are either sons of one's brother or sister, or sons of one's brother-in-law or sister-in-law.
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Homer Simpson -
Bart Simpson -
Herbert Powell -
Seymour Skinner -
Milhouse Van Houten -
Barney Gumble -
Todd Flanders -
Rod Flanders
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Sherri and Terri's children
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Bart Simpson
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Brit Simpson
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Omar Simpson
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Headmaster Skinnedwiener
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Seymour Skinner
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