Tithonus, in the Greek mythology son of Laomedon, who was wedded to Eos, who begged Zeus to confer on him immortality but forgot to beg for youth, so that his decrepitude in old age became a burden to him; he was changed into a cicada.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Titans * Titian, Vecellio