Children |
| 1. Siemowit Iii of Masovia, b. 1320, d. 16 Jun 1381 (Age 61 years) |
| 2. Euphemia of Masovia, b. Abt 1310, Czersk Pomorski, Chojnice, Bydgoszcz, Poland , d. Abt 1364, Cieszyn, Katowice, Poland (Age ~ 54 years) |
| 3. Eufemia Mazowiecka, b. 1310, Sochaczew, Sochaczew, Masovia, Poland , d. Český Těšín, Ostrava Region, Czechoslovakia |
| 4. Boleslaw Ii Jerzy Prince Of Galicia, b. Abt 1312, Czersk, Bydgoszcz, Poland , d. 7 Apr 1340, Galich, Stanislav, Ukraine (Age ~ 28 years) |
| 5. Kazimierz Czersk, b. Abt 1316, of, Plock, Mazovia, Poland , d. 26 Nov 1355, Poland (Age ~ 39 years) |
| 6. Ziemowit Von Mazovien, b. 1316, Bydgoszcz, Kujawsko-Pomorskie, Poland , d. 16 Jun 1381, Bydgoszcz, Kujawsko-Pomorskie, Poland (Age 65 years) |
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