Ok...first i will give the Three Knights names:
F.S.: Aqua
B.H.S.: Ven
E.S.: E.S.
U.E.M: Xehanort
Now something has been brought to my attention that has gotten me to thinking. In a cut scene i have seen, Xemnas, in a black coat, walks to roxas, waves letters in his face, and reveals his name...