(Πιτθεύς), 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.)
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