What was the name of Jethro Bodine's cousin on the Beverly Hillbillies?

Jed's daughter Elly May Clampett (Donna Douglas) is Jethro's cousin. Technically he and his "Uncle Jed" are also cousins, because he is the son of Jed's cousin Pearl.

Jethrine Bodine (also played by Max Baer, Jr.) was Jethro's twin sister.