Vortigern-- I love it. It does have a high fantasy, folkloric feeling to it, which is what the member above me is probably alluding to, but I don't see it as a negative. There are some truly pretentious sounding names; this one isn't included.
Vortigern was a British king who ruled several generations before King Arthur. He brought misery to Britain by welcoming the Saxons.Vortigern could also have been a title meaning "high king".