Jeff Kaplan is the father of Billy Kaplan and the husband of Rebecca Kaplan. He is a proud father of Billy and has supported him when Billy admitted to being homosexual, although he had to be told by Rebecca about his sexuality.
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Jeff Kaplan is considered a very minor character in the Marvel franchise, however has gained some apprecation by fans of the Young Avengers comics. Commonly, Jeff is paired with his wife as a secondary pairing in fanfictions. A gen fic with the Kaplan Family are also common.
Many fans also appreciate both Jeff and Rebecca because of their acceptance and parenting of Billy. Fans agree that Billy parents have very good parenting skills.