The origin of the word bigot in English dates back to at least 1598, via French. It started with the sense of "religious hypocrite", especially a woman.

What is the origin of bigot?

Some etymologists believe the Old French version of bigot, which means “sanctimonious,” was used by the French to mock the Normans, a people who lived in France and invaded Britain in 1066. Allegedly, the Normans used the Old English expression bi God so often that the French nicknamed them bigots.

What is the real meaning of bigotry?

1 : obstinate or intolerant devotion to one's own opinions and prejudices : the state of mind of a bigot overcoming his own bigotry. 2 : acts or beliefs characteristic of a bigot racial bigotry will not tolerate bigotry in our organization.