In Greek mythology, Tros was a ruler of Troy and the son of Erichthonius by Astyoche (daughter of the river god Simoeis) or of Ilus I, from whom he inherited the throne. Tros was the father of three sons: Ilus, Assaracus, and Ganymedes. He is the eponym of Troy, also named Ilion for his son Ilus. Tros's wife was said to be Callirrhoe, daughter of the river god Scamander, or Acallaris, daughter of Eumedes.