Saruman's REAL name

Greetings, dead ones. I was wondering: does anyone know Saruman's REAL name? I am not referring to his Elvish name (Curunir). I am talking about his name as a Maia in Valinor (i.e. Gandalf's name "...in the West in his youth", Olorin). I am writing a fan-fiction story to be posted on the BD fan-fiction site, and I desire to put this information in my narrative. Thank you very much!
L.T.