Apollodorus Library 3.1.1

[1]
  Having now run over the family of Inachus and described them from Belus down to the Heraclids, we have next to speak of the house of Agenor. For as I have said, ¹ Libya had by Poseidon two sons, Belus and Agenor. Now Belus reigned over the Egyptians and begat the aforesaid sons; but Agenor went to Phoenicia, married Telephassa, and begat a daughter Europa and three sons, Cadmus, Phoenix, and Cilix. ² But some say that Europa was a daughter not of Agenor but of Phoenix. ³ Zeus loved her, and turning himself into a tame bull, he mounted her on his back and conveyed her through the sea to Crete. ⁴ There Zeus bedded with her, and she bore Minos, Sarpedon, and Rhadamanthys; ⁵ but according to Homer, Sarpedon was a son of Zeus by Laodamia, daughter of Bellerophon. ⁶ On the disappearance of Europa her father Agenor sent out his sons in search of her, telling them not to return until they had found Europa. With them her mother, Telephassa, and Thasus, son of Poseidon, or according to Pherecydes, of Cilix, ⁷ went forth in search of her. But when, after diligent search, they could not find Europa, they gave up the thought of returning home, and took up their abode in divers places; Phoenix settled in Phoenicia; Cilix settled near Phoenicia, and all the country subject to himself near the river Pyramus he called Cilicia; and Cadmus and Telephassa took up their abode in Thrace and in like manner Thasus founded a city Thasus in an island off Thrace and dwelt there. ⁸