Family:Siemowit IV, Duke of Masovia and Alexandra of Lithuania (1)
Parents: Siemowit III of Masovia and Euphemia of Opawa
Siemowit IV _____, Duke of Masovia
b. Est 1352
d. 1425 or 1426
Parents: Algirdis and Uliana of Tver
Alexandra of Lithuania
b. Abt 1360
d. 20 Apr 1434 Płońsk, Warszawa, Poland
m. Abt 1388
Facts and Events
Marriage? Abt 1388
Children
BirthDeath
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
1394 or 1397 Warszawa, Poland
28 Sep 1429 Türnitz, Niederösterreich, Austria
6.
Euphemia of Masovia
1395/98
Bef 17 Sep 1447
7.
Amelia of Masovia
1397/98
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
Add child
Questionable information identified by WeRelate automation
To check:Catherine of Masovia (1)Born after mother was 50


Retrieved from "https://www.werelate.org/wiki/Family:Siemowit_IV%2C_Duke_of_Masovia_and_Alexandra_of_Lithuania_%281%29"