king of the island Scyros, in the Ægean Sea, father of Deidamia, by whom Achilles had Pyrrhus or Neoptolemus. He was secretly entrusted with the care of young Achilles, whom his mother Thetis had disguised in female attire, to prevent him proceeding to the Trojan war, where she knew he must unavoidably perish (Apollodorus, iii. 13, § 8; Sch. ad Il., xix. 332). He treacherously slew Theseus to gain the favour of Menestheus, or dreading the influence of the strangers upon his own subjects (Pausan. i. 17, § 6).