J.D. "Jed" Clampett, usually called Jed Clampett, is the apparent patriarch of the family with his mother-in-law Granny, nephew Jethro, and daughter Elly May. Although he had received little formal education, Jed Clampett has a good deal of common sense. He is a good-natured man and a widower. Jed's wife (Elly May's mother) died but is referred to in the episode "Duke Steals A Wife" as Rose Ellen.
He is the son of Luke Clampett and his wife, and has a sister named Myrtle. He attended Ozark Elementary. He did not earn a high school diploma, but was given an honorary doctorate degree after donating money to a college. Jed is shown to be an expert marksman and is extremely loyal to his family and kinfolk. The huge oil pool in the swamp he owned was the beginning of his rags-to-riches journey to Beverly Hills. Although he longs for the old ways back in the hills, he makes the best of being in Beverly Hills.
He owns Mammoth Studios which was purchased for him by Milburn Drysdale. Whenever he has anything on his mind, he sits on the curbstone of his mansion and whittles until he comes up with the answer. His catchphrase is, "Welllllll, doggies!"
Jed's full first name is never given in the television series, though 'Jedediah' was used in the 1993 Beverly Hillbillies theatrical movie (coincidentally, on Ebsen's subsequent series, Barnaby Jones, Barnaby's nephew J.R. was also named Jedediah). In one episode Jed and Granny reminisce about seeing Buddy Ebsen and Vilma Ebsen—a joking reference to the Ebsens' song and dance act. Jed appears in all 274 episodes.
J.D. "Jed" Clamplett is listed as a charter member of the original 1953 Church of the SubGenius, and is considered a master of slack.
According to Forbes Fiction 15, Jed is Chairman and CEO of Clampett Oil which went public I 1984. As of 2015, his wealth is $6.6 billion.