The definition of an ancestor is a person or creature from whom one is descended or who lived in the past, or a person who came before.
A source or cause; an origin:
An ancestor; forefather
An adoptive father
An ancestor (antonym of descendant)
Antecedent means a person who was born before you in your family.
One's relatives or family:
Find another word for forebears. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for forebears, like: ancestors, parents, progenitors, forerunners, forefathers, predecessors, mothers, fathers, ascendants, antecedents and kins.