Lewis & Short

ŏrīgĭnārĭus, a, um, adj. [origo],

  1. I. original (post-class.): colonus, Cod. Th. 11, 48, 7.
  2. II. Subst. plur.: ŏrigĭnārii, ōrum, m., original inhabitants, aborigines, Cod. Th. 10, 38.