Kavar said in the DS version of the events of the Onderon Civil war, that he wanted to train you as his Padawan, but his duties as a council-member kept him from doing so.
So this means that Vandar, Vrook, Kavar, and Atris could not have been the Exile's teachers. Perhaps it was one of the other council-members?
<{POST_SNAPBACK}>
Kavar could have been one of the Exile's masters.