Ephaan Kenzon was a Force-sensitive discovered on the Outer Rim world of Baltimn, who was brought back to Coruscant for Jedi training.
He eventually became the Jedi Padawan of E'koth Tassjun. On the verge of being expelled for his unauthorized actions against injustices in the Zeemacht Cluster, he left the Jedi Order and opened the School of Hidden Wisdom on his homeworld. He helped to hide escaping Jedi Knights during the Great Jedi Purge at his dueling academy, and also trained Force-sensitives in basic Jedi techniques. During the Galactic Civil War, Kenzon became a covert Rebel operative. He and his school came under Imperial scrutiny in 4 ABY, but the death of Palpatine saved him and his students from being rooted out by the Inquisitorius.
Several of his apprentices went on to train with Luke Skywalker at the Jedi Praxeum on Yavin 4.