(), a son of Pelops and Dia, was king of Troezene,
father of Aethra, and grandfather and instructor of Theseus. (Schol. ad Pind.
Ol. 1.144, Eur. Hipp. 11, Med. 683;
Paus. 2.30.8, 1.27.8; Apollod. 3.15.7; Strab. viii.
p.374.) When Theseus married Phaedra, Pittheus took Hippolytus into his house. (Paus. 1.22.2.) His tomb and the chair on which he had sat in judgment
were shown at Troezene down to a late time. (Paus. 2.31.3.) He
is said to have taught the art of speaking, and even to have written a book upon it. (2.31.4;
comp. THESEUS.) Aethra as his daughter is called Pittheis. (Ov. Ep. 10.31.)