Trojan hero claimed as an ancestor by Julius Caesar and Augustus (6)
I believe the answer is:
aeneas
(Other definitions for aeneas that I've seen before include "Virgil's Trojan hero" , "'Mythical Greek warrior, leader in the TrojanWar (6)'" , "Legendary Trojan wanderer" , "Trojan hero, son of Venus" , "Mythological Trojan hero" .)