Family:Siemowit IV, Duke of Masovia and Alexandra of Lithuania (1)

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Parents: Siemowit III of Masovia and Euphemia of Opawa Siemowit IV _____, Duke of Masovia b. Est 1352 d. Bet 1425 and 1426	Parents: Algirdis and Uliana of Tver Alexandra of Lithuania b. Abt 1360 d. 20 Apr 1434 Płońsk, Warszawa, Poland

m. Abt 1388

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Facts and Events

Marriage^? Abt 1388

Children

		Birth	Death
1.	Maria of Masovia
2.	Siemowit V of Masovia	1389	1442
3.	Władysław I of Masovia	1389	12 Dec 1455
4.	Jadwiga of Masovia	1392	1439
5.	Cymburgis of Masovia	Est 1394 Warszawa, Poland	28 Sep 1429 Türnitz, Niederösterreich, Austria
6.	Euphemia of Masovia	Est 1396	Bet 25 Jul 1447 and 17 Sep 1447
7.	Amelia of Masovia	Abt 1398	Aft 17 May 1434
8.	Trojden II of Płock	1403	25 Jul 1427
9.	Catherine of Masovia	1413	Abt 1480
10.	Casimir II of Masovia		15 Sep 1442

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