Gareth of Orkney is a Knight of the Round Table in the Le Morte d'Arthur version of the Arthurian legend and many modern works based on it. He is depicted as the youngest son of King Lot and the Queen
"The lady Lyoness [...] had his [Gareth's] dwarf in examination." N. C. Wyeth's illustration of her and Melot in The Boy's King Arthur (1922)