noun A female forebear or ancestor; a predecessoress.
noun 1 2 “Ancestor” defined identically by: Ancestors: Webster’s Quotations, Facts and Phrases (2008, ICON Group International, Inc.) on page 371, and by: Correctives: Webster’s Quotations, Facts and Phrases (2008, ICON Group International, Inc.) on page 205, as: Ancestor. An ancestor is a parent or (recursively) the parent of an ancestor. […T]he correct female form of the word is “ancestrix”, pl: “ancestrixes” or “ancestrices”.