⁵"Cú Chulainn." Wikipedia, the Free Encyclopedia. Web. 19 July 2011. <http://en.wikipedia.org/wiki/Cú_Chulainn>.
There are a number of variations for the spelling of "Cúchulainn" encountered in the different sources used here. To avoid confusion, we've normalized the spelling of the hero's name. He was born with the name "Sétanta," but it was changed to Cúchulainn, meaning "Culann's Hound," when he was attacked by, and then killed Culann's guard dog. He offered to train a new dog, and in the meantime serve as the guard dog himself. In tradition, Cúchulainn was also known as "The Hound of Ulster."