Lewis & Short

gentīlĭtas, ātis, f. [gentilis], the relationship of those who belong to the same gens.

  1. I. Lit.: gentilitatum, agnationum, etc. … jura, Cic. de Or. 1, 38, 173; cf.: de toto stirpis ac gentilitatis jure dicere, id. ib. 1, 39, 176; Plin. Pan. 37, 2.
  2. II. Transf.
    1. A. Concr., relatives bearing the same name, kindred: omnes Tarquinios eicerent, ne quam reditionis per gentilitatem spem haberent, Varr. ap. Non. 222, 17: gentilitas ejus Manlii cognomen ejuravit, Aur. Vict. Vir. Ill. 24; Inscr. Orell. 156; 1663.
      In plur.: sparsas atque ut ita dicam laceras gentilitates colligere, Plin. Pan. 39, 3.
    2. B. Of plants, bearing the same name, Plin. 23, 7, 65, § 131; 12, 13, 30, § 51.
    3. C. In eccl. Lat., heathenism, paganism: gentilitas (opp. Dei religio), Lact. 2, 13 fin.; Vulg. Judith, 14, 6.
      1. 2. Concr., the heathen, pagans, Prud. στεφ. 10, 1086; Tert. Verg. Vel. 2; Hier. ad Ephes. 5 fin.