text: Other names Among the appellations under which Achilles is generally known are the following: Pyrisous, "saved from the fire", his first name, which seems to favour the tradition in which his mortal parts were burned by his mother Thetis Aeacides, from his grandfather Aeacus Aemonius, from Aemonia, a country which afterwards acquired the name of Thessaly Aspetos, "inimitable" or "vast", his name at Epirus Larissaeus, from Larissa (also called Cremaste), a town of Achaia Phthiotis in Thessaly Ligyron, his original name Nereius, from his mother Thetis, one of the Nereids Pelides, from his father, Peleus Phthius, from his birthplace, Phthia Podarkes, "swift-footed" (literally, "defending with the foot," from the verb ἀρκέω, "to defend, ward off"); Ptolemy Hephaestion, alternatively, says that it was due to the wings of Arke being attached to his feet.Hidden on Skyros Some post-Homeric sources claim that in order to keep Achilles safe from the war, Thetis (or, in some versions, Peleus) hid the young man dressed as a princess or at least a girl at the court of Lycomedes, king of Skyros.There, Achilles, properly disguised, lived among Lycomedes' daughters, perhaps under the name "Pyrrha" (the red-haired girl), Cercysera or Aissa ("swift").With Lycomedes' daughter Deidamia, with whom he had begun a relationship, Achilles there fathered two sons, Neoptolemus (also called Pyrrhus, after his father's possible alias) and Oneiros.According to this story, Odysseus learned from the prophet Calchas that the Achaeans would be unable to capture Troy without Achilles' aid.Odysseus went to Skyros in the guise of a peddler selling women's clothes and jewellery and placed a shield and spear among his goods.When Achilles instantly took up the spear, Odysseus saw through his disguise and convinced him to join the Greek campaign.