Pandion I was the son of King Ericthonius of Athens. He succeeded his father as king and was succeeded by his son Erectheus. After Erectheus died, the kingship passed between the descendants of Erectheus (through Metion and Orneus) and those descended from Pandion's second son; Cecrops II. The two branches often fought between themselves, deposing members from other branches. Some of Pandion's notable descendants are his great-grandson; Daedalus, son of Metion, and Aegeus, son of Pandion II and grandson of Cecrops II. The famous hero-king Theseus was the son of Aegeus.