In Greek mythology, Pirithous - Πειρίθοος (also transliterated
as Perithoos, Peirithoos or Peirithous) was the King of the
Lapiths in Thessaly and husband of Hippodamia, at whose
wedding the famous Battle of Lapiths and Centaurs occurred. He
was a son of "heavenly" Dia, fathered either by Ixion or by
Zeus. His best friend was Theseus. In Iliad I, Nestor
numbers Pirithous and Theseus "of heroic fame" among an
earlier generation of heroes of his youth, "the strongest men
that Earth has bred, the strongest men against the strongest
enemies, a savage mountain-dwelling tribe whom they utterly
destroyed". No trace of such an oral tradition, which Homer's
listeners would have recognized in Nestor's allusion, survived
in literary epic...
（*Peiri/qoos), a son of Ixion or Zeus by Dia, of Larissa in
Thessaly (Hom. Il. 2.741, 14.17; Apollod. 1.8 § 2; Eustath. ad
hom. p. 101 i. He was one of the Lapithae, and married to
Hippodameia, by whom he became the father of Polypoetes (Hom.
Il. 2.740, &100.12.129). When Peirithous was celebrating his
marriage with Hippodameia, the intoxicated centaur Eurytion or
Eurytus carried her off, and this act occasioned the
celebrated light between the centaurs and Lapithae (Hom. Od.
xi, 630, 21.296, Il. 1.263, &c.; Ov. Met. 12.224). He was
worshipped at Athens, along with Theseus, as a hero. (Paus.
1.30.4; comp. Apollod. 1.8.2; Paus. 10.29.2; Ov. Met. 8.566;
Plin. >H. N. 36.4, and the articles HERACLES and CENTAURI.) -
A Dictionary of Greek and Roman biography and mythology,
William Smith, Ed.