For 10 points, name this hero of the Ulster cycle, formerly known as Setanta, who was renamed after he killed the hound of the smith Culann.
This character once rescued the princess Derbforgaill and awarded her to his foster son Lugaid. After training in Scotland, this character stormed the castle of Forgall to win his wife Emer. He fought single-handedly at the Cattle Raid of Cooley against the armies of Maeve and is famously skilled with his spear, Gae Bulg. For 10 points, name this hero of the Ulster cycle, formerly known as Setanta, who was renamed after he killed the hound of the smith Culann.
This character once rescued the princess Derbforgaill and awarded her to his foster son Lugaid.
{Cuchulainn}