Aeneas was a Trojan prince who escaped with his father Anchises and a few other Trojans after the fall of Troy to the Greeks. He was said to have been the son of Aphrodite and Anchises. He went to Carthage first and fell in love with Queen Dido. He had to leave her because the Gods told him his destiny was in Italy.
When Aeneas left, Queen Dido was heart-broken and died. Aeneas went to Italy and founded Rome. From his bloodline came Romulus and Remus and all of the Caesars and Kings of Rome. His descendant King Brutus went to England with several other Romans and founded the Pendragon line of kings all the way through King Arthur up until William the Conqueror came in. These Trojans/Romans called themselves Danaan. Some of their people went to Ireland and probably were the Tuatha De Danaan.
Sources:
http://en.wikipedia.org/wiki/Aeneas
http://en.wikipedia.org/wiki/Brutus_of_Britain
