Ganymede

Ganymede was a term sometimes used to refer to passive gay men or youths. It derives from the mythological figure Ganymede (Ancient Greek Γανυμήδης, Ganymēdēs) a Trojan prince whom the god Zeus, in the form of an eagle, carried off to be his cup-bearer on Mount Olympus.

In Latin (via Etruscan) the name was redered as Catamitus, hence the more common term Catamite.