In 1387, she married Siemowit IV, Duke of Masovia, and bore him thirteen children. Life 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.
Boleslaw I of Masovia (c. 1210 – 17 April 1248), Duke of Masovia (1247–1248) Casimir I of Kuyavia (born between 1210 and 1213 – died 14 Dec 1267) Prince of Kuyavia (1247–1267) Siemowit I of Masovia (c.1213 – 24 June 1262), succeeded eldest brother as Duke of Masovia (1248–1262)
- c. 1187/88
- Helen of Znojmo
- 31 August 1247
- Agafia of Rus
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
Siemowit II of Masovia Siemowit II of Rawa , was a Polish prince member of the House of Piast , Duke of Warsaw and Liw during 1310-1313, after a new division with his brothers since 1313 ruler over Rawa Mazowiecka, Zakroczym , Ciechanów and Wizna , regent of Płock during 1336–1340.
Life. 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.
1 Boleslaw II MASOVIA =Kunegunde of BOHEMIA 2 Waclaw Plocki of POLAND =Elzbieta (Dannila) Gediminaite of LITHUANIA 3 Bloeslaw III of PLOCK 3 Anna of PLOCK =Henry III (V) of SILESIA-GLOGAU-SAGAN 2 Eufrozyna of (Masowski) MASOVIA =Wladislaw of SILESIA-AUSCHWITZ 3 John I of SILESIA-AUSCHWITZ =Salome Reuss of PLAUEN 3 Anna of SILESIA-AUSCHWITZ ...
Nota bene my own hometown, 30 km away to the east, was located in the allied duchy of Masovia, and its town charter was granted by the Masovian sovereign prince Siemowit V of Masowia in AD 1427.
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In 1387 Alexandra married Siemowit IV, Duke of Masovia. The marriage followed Union of Krewo when Siemowit IV agreed not to rival Grand Duke of Lithuania Jogaila (brother of Alexandra) and to support him as the new King of Poland. Alexandra's and Siemowit's daughter Cymburgis married Ernest, Duke of Austria in 1412.
In 1387 Alexandra married scion of the Piast Dynasty Siemowit IV, Duke of Masovia as a part of compromise between the duke of Masovia on one side and his king Jadwiga of Poland and her consort and Jure uxoris king Władysław II Jagiełło on the other, agreement signed on December 12, 1385, (the marriage followed Union of Krewo