In Greek mythology, Thersanon or Thersanor[note 1] is one of the Argonauts, the crew of the legendary Argo. Born on the island of Andros, Thersanon was the son of the sun god Helios by a woman named Leucothoe; he joined Jason and the other Argonauts in the quest for the golden fleece, kept by King Aeëtes of Colchis, who was himself a son of Helios and thus one of Thersanon's paternal half-brothers.[2]
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