catamite
Concise Oxford English Dictionary © 2008 Oxford University Press:
catamite /ˈkatəmʌɪt/
▶noun archaic a boy kept for homosexual practices.
– origin C16: from L. catamitus, via Etruscan from Greek Ganumēdēs ‘Ganymede’ (the name of Zeus's cup-bearer in Gk mythology).
'catamite' also found in these Oxford entries:

