Lewis & Short

Părīsĭi, ōrum, m.,

  1. I. a people of Celtic Gaul, bordering on the Senones, Caes. B. G. 7, 4; 35; 75; Plin. 4, 18, 32, § 107. Their chief city, Lutetia Parisiorum (late Lat. also Parisii), stood on the isle of Paris, Caes. B. G. 6, 3; 7, 57; Amm. 20, 4, 11; 20, 5, 1.
    Hence,
  2. II. Părīsĭăcus, a, um, adj., of or belonging to the Parisians, Parisian: arx, Ven. Vit. S. Mart. 4, 636: NAVTAE, Inscr. Murat. 1066, 5.