The Brienne/Beaumonts, a noble family originally from Champagne, spread across Europe and the Eastern Mediterranean in the Middle Ages. Their story begins with John de Brienne (c. 1175/78-1237), who was the emperor of Constantinople, became king of Jerusalem by marriage, and claimed the throne of a kingdom in modern-day Turkey called Armenian Cilicia. His life, his children and his grandchildren's lives were remarkably international.
His daughters...