Etymology
From Medieval Latin Carthusianus, from Cart(h)usia, Latinization of Old French Chartrouse, a region near Grenoble where the order was founded, now Chartreuse; from Late Latin Catorissium, Cantourisa, Caturissium, Chatrousse, probably ultimately from Gaulish *Katurīx (literally “battle-king”). Also see Caturix, Helvetian war god.