Lewis & Short

cŏmĭtīvus, a, um, adj. [comes, II. E.], pertaining to a chief officer (post-class.): dignitas, Veg. Mil. 2, 9: sedes. Cod. Th. 11, 21, 3; also, subst., a chief, Cod. Just. 1, 33, 3 al.