Brienne is a name of French origin, derived from the word "brien," which means "hill." It is often associated with the French province of Brittany. Historically, Brienne was also the name of a region in France, home to several notable families, including the House of Brienne, a powerful noble family during the Middle Ages.
Brienne's popularity as a baby girl name peaked in the late 70s and early 80s with over 100 births per year during those periods. Since then, it has steadily declined, reaching a low of 7 births in 2006. Recent years show a slight increase again, with around 20-35 births annually since 2014. In total, over the span of 46 years, there have been 1485 babies named Brienne.