(Πύλας), a son of Cteson, and king of Megara, who, after having slain Bias, his own father's brother, founded the town of Pylos in Peloponnesus, and gave Megara to Pandion who had married his daughter Pylia, and accordingly was his son-in-law. (Apollod. 3.15.5; Paus. 1.39.6, where he is called Pylos, and 6.22.3, where he is called Pylon.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890