etymologeek.com dictionary
English word ancestor comes from Middle English (1100-1500) ancessour.

Ancestor etymology history?

Ancestor detailed word origin explanation

Dictionary entryLanguageDefinition
ancessour Middle English (1100-1500) (enm)
ancestor English (eng) (figuratively) One who had the same role or function in former times.. (legal) One from whom an estate has descended;—the correlative of heir.. An earlier type; a progenitor. One from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a forefather.