William Henry Dudley Le Souef (28 September 1856 – 6 September 1923) was a founding member and founding Secretary of the Royal Australasian Ornithologists Union (RAOU) in 1901, also serving as President of that body 1907-1909. His egg collection was sold to Henry Luke White, becoming part of the H. L. White Collection which passed to the National Museum of Victoria.
Le Souef was the son of Albert Alexander Cochrane Le Souef and brother of Ernest Albert Le Souef and Albert Sherbourne Le Souef.
Robin, Libby. (2001). The Flight of the Emu: a hundred years of Australian ornithology 1901-2001. Carlton, Vic. Melbourne University Press.