In Greek mythology, Elephenor (Greek: Ἐλεφήνωρ, -ορος) was the son of Chalcodon (by either Imenarete, Melanippe or Alcyone) and king of the Abantes of Euboea. He received the sons of Theseus of Athens, Acamas and Demophon, when they fled the usurper Menestheus.[1][2] One source states that he unwittingly killed his grandfather Abas and was expelled from Euboea; because of that, he had to assemble his troops before the Trojan expedition on a rock of Euripus opposite Euboea.[3] He was a suitor of Helen[4] and the leader of the Euboean force of thirty or forty ships which joined the Greek expedition to Troy.[5][6][7] On the day the truce was broken by Pandarus, Elephenor was killed by Agenor whilst trying to drag off the body of Echepolus.[8] On their way home, Elephonor's men were driven off course and shipwrecked off the coast of Epirus, where they founded the city of Apollonia. Alternately, Elephenor survived and settled on the island Othronos near Sicily, but was soon driven out of the island by a serpent and went to Abantia in Illyria.[3]