3. | Maria Jurjewna Princess of Halicz was born about 1288 in Halicz, Ukraine; died on 11 Jan 1340 in , , Poland. Children:
- Siemowit Iii of Masovia was born in 1320; died on 16 Jun 1381; was buried in Plock, Mazowieckie, Poland.
- Euphemia of Masovia was born about 1310 in Czersk Pomorski, Chojnice, Bydgoszcz, Poland; died about 1364 in Cieszyn, Katowice, Poland.
- Eufemia Mazowiecka was born in 1310 in Sochaczew, Sochaczew, Masovia, Poland; died in in Český Těšín, Ostrava Region, Czechoslovakia.
- 1. Boleslaw Ii Jerzy Prince Of Galicia was born about 1312 in Czersk, Bydgoszcz, Poland; died on 7 Apr 1340 in Galich, Stanislav, Ukraine.
- Kazimierz Czersk was born about 1316 in of, Plock, Mazovia, Poland; died on 26 Nov 1355 in Poland.
- Ziemowit Von Mazovien was born in 1316 in Bydgoszcz, Kujawsko-Pomorskie, Poland; died on 16 Jun 1381 in Bydgoszcz, Kujawsko-Pomorskie, Poland.
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