Dominus

Dominus was a Jedi Master during the Exar Kun War. A saggy-jowled, gray-skinned alien male, he trained Zona Luka in the ways of the Jedi. During the War, Exar Kun corrupted Luka and sent her to kill Dominus. Dominus put up quite and fight, and the two Jedi mortally wounded each other. The murder scene was later investigated by the Jedi Shadows.

--SOURCES--
 * Tales of the Jedi: The Sith War.