Ipotane
Ipotanes or hippotaynes are mythical creatures. They are usually depicted as being half-human half-horse creatures much different from the centaurs. Although sometimes attributed to Greek mythology, the term appears to have originated at a much later date, and without a definite description; they are first mentioned in John de Mandeville's fourteenth-century Travels. Ipotanes appear in modern works of the fantasy genre.
John de Mandeville
In his 1356 travelogue, The Travels of Sir John Mandeville, the author reports the existence of a violent race of ipotanes, found in Bacharie.More recent editions of Mandeville's work use various spellings; hippotaynes, hippopotami.