The Enemy of Sauron
Gandalf - name given by the Men of the North, the Dunedain.
Gandalf the Grey
Gandalf the White
Gandalf Greyhame - name given by the Rohirrim
Grey Fool
Grey Pilgrim - translated from Sindarin
Grey Wanderer
Incanus
Lathspell - "Ill News"
Mithrandir - Sindarin Elvish name "Grey Pilgrim"
Olorin - name in Valinor
Tharkun - name given by Dwarves
White Rider.