Baldwin I of Constantinople Latin Emperor of Constantinople (1172 - c.1205) (1172–1205) Parents Margaret I, Countess of Flanders Baldwin V, Count of Hainaut Children Margaret II, Countess of Flanders Joan, Countess of Flanders Siblings Philip I of Namur Henry of Flanders Yolanda of Flanders Isabella of Hainault Sybilla of Henao Eustace of Flanders Partners Marie of Champagne
