Heren Istarion

The Elvish name given to the five powerful beings who came to Middle-earth after some thousand years of the Third Age had passed. Their leader was Curunír (whom Men called Saruman), and other members of the order were Mithrandir (Gandalf), Aiwendil (Radagast) and two others, whose names seem to have been Alatar and Pallando. The order appears to have had little obvious organisation, and its members wandered at will through Middle-earth. However, it does seem that the White Wizard was considered the chief, and after Saruman eventually became corrupted, Mithrandir was transformed from Gandalf the Grey to Gandalf the White.