I am currently studying the Valois and Hapsburg rulers of Burgundy. They all have some interesting titles:
Philip the Bold
John the Fearless
Philip the Good
Charles the Bold
Philip the Fair
Joanna the Mad (my personnal favorite)
Of course there are other examples throughout histroy like Ivan the Terrible, William the Conqueror (or bastard, depending on whcih side of the English channel you are) and Ethelred the Unready to name a few.
I was wondering what you thought your star wars characters title would be? Also what you think others here would be called, afterall you don't normally get to give yourself this type of title.
EDIT: Oh and how could I forget Ming the Merciless *cough*