Louis of Acre

Louis of Brienne, called Louis of Acre (c. 1230–after 1285), was a younger son of John of Brienne, king of Jerusalem and Latin emperor of Constantinople, and Berengaria of León. As a boy he left Constantinople with his brothers for the court of their cousin Louis IX of France, whose crusade he joined in Egypt.

Around 1253 he married Agnes of Beaumont, heiress to the viscounty of Beaumont in Maine, holding Beaumont, Fresnay and Sainte-Suzanne in her right. His sons included his heir John, Henry de Beaumont, and Louis, bishop of Durham; his daughter Margaret married Bohemond VII of Tripoli.