ancestor (n.) Look up ancestor at Dictionary.com
"one from whom a person is descended," c. 1300, ancestre, antecessour, from Old French ancestre, ancessor "ancestor, forebear, forefather" (12c., Modern French ancêtre), from Late Latin antecessor "predecessor," literally "fore-goer," agent noun from past participle stem of Latin antecedere "to precede," from ante "before" (see ante) + cedere "to go" (see cede). Current form from early 15c. Feminine form ancestress recorded from 1570s.