Whitehart

The White Hart was the personal badge of Richard II, who probably derived it from the arms of his mother, Joan "The Fair Maid of Kent", heiress of Edmund of Woodstock. It may also have been a pun on his name, as in "Rich-hart". In the Wilton Diptych, which is the earliest authentic contemporary portrait of an English king, Richard II wears a gold and enamelled white hart jewel, and even the angels... (Wikipedia)