Grant Clinton is the father of Ted DeWitt-Clinton. Ted's mother is Leslie DeWitt; it is not clear whether Ted's parents are legally married, as they don't share a last name. He makes his only appearance in episode 207, The New Kid.
Grant and Leslie vocally claim a dislike for modern society and its 'offerings'. Their house is equipped with solar panels. They plant corn, squash and beans in the front and back yards. They don't drink coffee or alcohol and do not watch television. They hate the Beatles and gum, and despise Greenpeace. Grant has made a wooden couch with Ted, carved from a whole tree.
From their only appearance in 207, they seem very protective of their son. They visit and berate the Morgendorffers when they think Daria is being a bad influence on Ted. Ted reveals later that he had been home-schooled prior to asking his parents to change to a public school.