Teuthras (Ancient Greek: Τεύθρας) was a king of Mysia and mythological eponym of Teuthrania. He received Auge — mother of Telephus by Heracles — either as wife or as foster-daughter; when Idas threatened his throne, Telephus arrived, defeated the usurper, and was named successor. In some versions Teuthras raises mother and son together; a rare strand even makes him Telephus' biological father.
Adapted from Wikipedia, "Teuthras" · CC BY-SA 4.0
I.Auge and Telephus
Apollodorus and allied sources have Teuthras receive Auge from Nauplius after her exposure and wanderings. He either marries her or adopts her as a daughter. When Idas tries to seize Mysia, Telephus — guided by Delphi to find his mother — arrives in time, defeats Idas, and is recognized; Teuthras gives him Argiope to wife and, having no son of his own, names him heir.
Other accounts keep Auge and the infant Telephus together so that Teuthras raises the boy as his own; Stephanus of Byzantium and related notices preserve a version in which Teuthras himself begets Telephus on Auge.
II.Other children
In the Iliad a Teuthras is named as father of Axylus. Dictys Cretensis and related tradition also give him a son Teuthranius by Auge, and sometimes make him father of Tecmessa (elsewhere daughter of the Phrygian Teleutas). This node is the Mysian king of the Auge–Telephus cycle (teuthras-mysia).