Seven briefly joined the Bundy family in season seven. His real parents are Zenas and Ida May - Peggy's cousins who ditched him. Strangely, Peggy would dote on him to the chagrin of her real children, Kelly and Bud. Seven was not in very many episodes - and was last seen walking up the stairs to his room. He was never mentioned or heard from again - although we do see his face on a milk carton on a later episode.