Word Origin & History
O.E. Troian "of or pertaining to ancient Troy," from L. Trojanus, from Troia, Troja "Troy," from Gk. Tros, name of a king of Phrygia, the mythical founder of Troy. In 17c., it was a colloquial term for "person of dissolute life, carousing companion." The trade name for a brand of prophylactic contraceptive
was registered 1927 in U.S. Trojan horse is attested from 1574; the computer virus sense is attested by 1982.