Source : Webster's Revised Unabridged Dictionary (1913)

Ancestral \An*ces"tral\ (?; 277), a.
   Of, pertaining to, derived from, or possessed by, an ancestor
   or ancestors; as, an ancestral estate. ``Ancestral trees.''
   --Hemans.

Source : WordNet®

ancestral
     adj 1: inherited or inheritable by established rules (usually legal
            rules) of descent; "ancestral home"; "ancestral lore";
            "hereditary monarchy"; "patrimonial estate";
            "transmissible tradition" [syn: {hereditary}, {patrimonial},
             {transmissible}]
     2: of or belonging to or inherited from an ancestor