Source : Webster's Revised Unabridged Dictionary (1913)

Gentilitial \Gen`ti*li"tial\, Gentilitious \Gen`ti*li"tious\, a.
   [L. gentilitius. See {Gentile}.] [Obs.]
   1. Peculiar to a people; national. --Sir T. Browne.

   2. Hereditary; entailed on a family. --Arbuthnot.