Ποιος παντρεύτηκε το Νικόλαος Α΄ του Σαιντ-Ομέρ;

Margaret of Hungary (Margit in Hungarian; b. 1175 – d. after 1229) was a Hungarian princess from the House of Árpád. She was a Byzantine Empress by marriage to Isaac II Angelos (d. 1204), and Queen of Thessalonica by marriage to Boniface of Montferrat (d. 1207). She was regent of Thessalonica during the minority of her son Demetrius of Montferrat, from 1207 to 1216. In later years (c. 1223) she governed some of the most southern regions of the Kingdom of Hungary, with her domains being centered in the region of Syrmia.