Forefather – an ancestor, someone you are descended from

(Pronounced fawr-fah-ther)

She drank the formula made by her father (forefather) so she could travel back in time and meet her ancestor.

Examples of forefather in a sentence

She scoured the internet trying to find information about her forefathers so she could write her report on her family's history. 

After being arrested again his parents called him a disappointment to his forefathers.  

After some meticulous research he found out that his forefathers were once part of the royal family.