ancestral

adjective

1. pertaining to ancestors; descending or claimed from ancestors: an ancestral home.
2. serving as a forerunner, prototype, or inspiration.

adjective

1. of, inherited from, or derived from ancestorshis ancestral home

noun

2. logic a relation that holds between x and y if there is a chain of instances of a given relation leading from x to y. Thus the ancestral of parent of is ancestor of, since x is the ancestor of y if and only if x is a parent of…a parent of…a parent of y