According to Jim COMPLETE S 1-8
http://www.imdb.com/title/tt0285351/
Jim is an abrasive but lovable suburban father. Much like his real life counterpart, Jim's character is noted as a fan of blues music, as well as the Chicago Bears, Chicago Cubs, Chicago Bulls and the Chicago Blackhawks. Together with his wife Cheryl, whose middle name is Mabel, they have three children, daughters Ruby and Gracie and son Kyle. In the seventh season they become parents of a pair of twins Jonathan and ...
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