William Clarke Wontner (17 January 1857 Stockwell, Surrey - 23 September 1930 Worcester), was an English portrait painter steeped in Academic Classicism and Romantic.

Wontner was born in Stockwell, Surrey, the son of noted architect, designer and renderer William Hoff Wontner (1814–1881) and Catherine Smith.

Under the tutelage of his father, Wontner worked with John William Godward (1861–1922), a noted exponent of what became known as Greco-Roman style. The two were destined to become great friends.

Wontner was a relatively minor painter who was part of the neo-classical movement in England, led by Alma-Tadema. His style favoured seductively languorous women against classical or oriental marbled backdrops. His faithfull...