A son of Priam and Hecabe (Hom. Il. xxiv. 257), or according to others a son of Apollo. (Apollod. iii. 12. § 5.) He fell by the hands of Achilles (Virg. Aen. i. 474; Horat. Carm. ii. 9. 16; Cic. Tusc. i. 39); others relate that Achilles ordered Troilus who was made prisoner to be strangled (Dict. Cret. iv. 9), or that Troilus, when fleeing from Achilles, ran into the temple of the Thymbraean Apollo, where Achilles slew him on the same spot where he himself was afterwards killed. (Tzetz. ad Lyc. 307.)