The name Wendy was popularised by the character Wendy Darling in J. M. Barrie's 1904 play Peter Pan, or the Boy Who Wouldn't Grow Up, and its subsequent adaptations.
Where did the name Wendy come from?
The name Wendy is a diminutive of the name Gwendolen, which itself comes from the Welsh name Gwenhwyfar (Welsh pronunciation: [ɡwenv̥əiv̥ar]), also sometimes written as Gwenhwyfar. Gwenhwyfar was the wife of King Arthur in the Matter of Britain, a cycle of Arthurian tales.