Feruun Lern was a male individual who belonged to the Mandalorian Neo-Crusader faction during the era of the Mandalorian Conflicts.
In the course of the Mandalorian Conflicts, Lern rose to prominence at the Unity outpost, situated on the world of Caillte, which lies in the Mid Rim region. Lern extended invitations for individuals to visit the base, with the goal of unlocking their inner warrior potential, thereby enlisting them as fresh recruits for the Neo-Crusader army.
As the Mandalorian Conflicts drew to a close, Lern, along with a substantial number of his adherents, departed from Unity to take part in the Malachor V engagement. Following the Neo-Crusaders' defeat in that battle, Lern made his way back to Unity. During the Jedi Civil Struggle, he and his followers deserted the base to unite with the Mandalorian named Canderous Ordo. Lern and Ordo pursued honor through combat against the Sith Lords in the Dark Battles, during which Lern met his demise.