Background
Though Alexandra"s exact date of birth is not known, it is thought that she was born in the late 1360s or early 1370s.
Though Alexandra"s exact date of birth is not known, it is thought that she was born in the late 1360s or early 1370s.
On 12 December 1385, few months after the Union of Krewo, Siemowit IV, Duke of Masovia, reached a compromise with king Jadwiga of Poland and her intended consort king Jogaila (Władysław II Jagiełło), brother of Alexandra. Siemowit IV agreed to cease his rival claims to the Kingdom of Poland, pay homage to Jadwiga and Jogaila, and to assume position of a hereditary vassal to the Polish Crown in exchange for 10,000 Prague groschen and fief Duchy of Belz. The agreement was solidified by marriage of Siemowit IV and Alexandra in 1387.
Alexandra died and was buried in Płock.
Sons:
Kazimierz II of Masovia
Trojden II of Masovia
Władysław I of Płock
Siemowit V of Masovia
Alexander of Masovia. Who was a diplomat and Bishop of Trento, titular Bishop of Chur, titular Cardinal of Damascus, and Patriarch of Aquileia.
Daughters:
Euphemia of Masovia. Married Bolesław I, Duke of Cieszyn
Cymburgis of Masovia.
Married Ernest, Duke of Austria
Jadwiga of Masovia.
Married John Garay, son of Nicholas I Garay
Amelia of Masovia. Married William II, Margrave of Meissen
Anna of Masovia. Possibly married Michael Žygimantaitis
Maria of Masovia.
Married Bogislaw IX, Duke of Pomerania
Alexandra of Masovia
Katarzyna of Masovia.
Married Michael Žygimantaitis
Grandchildren of Alexandra and Siemowit IV included Frederick III, Holy Roman Emperor, Przemyslaus II, Duke of Cieszyn, Sophie of Pomerania, Duchess of Pomerania and Dorothy Garai.
