Lewis was born before 1270, son of Louis de Brienne and Agnès de Beaumont-au-Maine and grandson of John of Brienne, King of Jerusalem by his third wife, Berengaria of Leon, making him a second cousin of Edward II.
A descendant of Lewis was born before 1270, the son of Louis de Brienne and Agnès de Beaumont-au-Maine, and a great-grandson of John of Brienne, King of Jerusalem by his third wife, Berengaria of Leon, linking him to Edward II as a second cousin.