Margaret-Mary of Hungary (c. 1177–?)

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Margaret-Mary of Hungary (c. 1177–?)

Eastern Roman empress . Born around 1177; death date unknown; daughter of Anne of Chatillon-Antioche (c. 1155–1185) and Bela III, king of Hungary (r. 1173–1196); sister of Emeric I, king of Hungary (r. 1196–1204), and Andrew II (1175–1235), king of Hungary (r. 1205–1235); married the widowed Isaac II Angelus, Eastern Roman emperor (r. 1185–95 and 1203–04); married Boniface of Montferrat; children: (first marriage) Alexius IV Angelus (d. 1204), emperor of Byzantium (r. 1203–1204); Irene Angela of Byzantium (d. 1208, who married Philip of Swabia); (second marriage) Demetrius of Thessalonica.