Gordon Tennyson

Gordon Tennyson is the brother of Max Tennyson and the father of Joel Tennyson. Unlike Max's side of the family, he, his wife (Betty Jean Tennyson), and their son are all members of The Plumbers.

In the episode Big Fat Alien Wedding, his son Joel marries a Sludge alien named, Camille (putting an end to a long ending feud between the Sludgepuppies and the Plumbers). Both he and his wife were against the wedding at first (due to Camille's being a Sludge), but later realize they had treated her unfairly and apologize for the way they treated her, accepting her into the family.