Xavian is named after Xavius, one of the night elves responsible for summoning the burning legion through a portal manifested from the Well of Eternity in Zin-Azshari in what became later known as the War of the Ancients. Sargeras transformed Xavius into the first satyr when he became unhappy with his progress with the portal. With as close as Xavian is to Azshara, it's easy to assume that this is why it's named so. Terestian Illhoof in Karazhan may be related in some way to Xavian, as he drops .