Albigensian (adj.)

c. 1600, "relating to the Albigenses," collective name for the Catharist religious reformers of southern France c. 1020-1250, from Medieval Latin Albigenses (12c.), from French Albi, name of the town in Languedoc where they lived and first were condemned as heretics (1176) and vigorously persecuted (the Albigensian Crusade). The town name is from Roman personal name Albius, from Latin albus "white" (see alb). Also sometimes Albanesian.