Anseau de Cayeux, Regent of Latin Empire of Constantinople

Anseau de Cayeux or Anselm de Cayeux was a French knight from Picardy, who participated in the Fourth Crusade (1202-1204) and later became one of the leading nobles of the Latin Empire of Constantinople, serving under emperors Baldwin I (1204-1205) and Henry I (1206-1216). Regarding later data, scholars are divided. Some hold that it was he who was married to Byzantine princess Eudokia Laskarina, younger daughter of the former emperor Theodore I Laskaris, and later became regent in Constantinople (1237-1238), while others hold that those data refer to his son of the same name.