I am doing the quest The History of Avabarg and during the quest Leothred says "Forthári’s youngest son was Frumgar, a boy of twelve, now Chieftain of the Ai-thúda. While still a youth, Frumgar became a hero of his people, befriending both the Longbeard Dwarves and the Wizards Gandalf the Grey and Barandil the Brown."
But there is only one brown wizard, and that is Radagast, and that is not one of his known names.
What gives?