"forebearers" is not actually a word

"forebears" means ancestors. "forebearers" is not a word according to
any serious dictionary (Merriam-Webster does not count).

http://katherinebarber.blogspot.com/2012/09/please-forbear-from-using-forebearer.html
Merge pull request #438 from gilesbowkett/forebears

copy edit: "forebearers" is not actually a word