Barbara McCoy is the daughter of Leonard McCoy and worked as a xenozoologist at Urey University on Earth, where she was adept at working alongside many different animals, including the telepathic ursid-like Vrell. (TOS comics: "Furlough to Fury", "World Beneath the Waves")

Barbara is apparently a wholly separate character from Joanna McCoy. It is possible McCoy's two daughters also shared a mother, Jocelyn Darnell.