Marvin Goldberg is Murray's, unreliable brother. He comes to the Goldbergs' house at Thanksgiving every year. He is the Son of pop pop, the brother of Murray, The Brother in law of beverly Goldberg, and the uncle of Adam, Barry, and Erica.

He always fights with Murray But The kids love him.                       

In Ho-ly K.I.T.T. he and Adam steal KITT from the gimbels Thanksgiving parade. Beverly loves inviting him to thanksgiving.