Ziemowit IV Prince of CZERSK
He married Aleksandra Princess of Lithuania 1387 . Aleksandra Princess of Lithuania was born at of Vil'nyus, Vil'nyus, Lithuania Abt 1365 daughter of Algirdas, Grand Duke of Lithuania and Yuliyana Aleksandrovna Princess of Tver .
They were the parents of 12
children:
Ziemowit V Prince of Sochaczew
born Abt 1389.
Jadwiga Princess of Czersk
born Abt 1390.
Cymbarka Princess of Czersk
born Abt 1391.
Eufemia Princess of Czersk
born Abt 1393.
Aleksander Prince of Czersk
born Abt 1395.
Amelia Princess of Czersk
born Abt 1397.
Kazimierz II Prince of Belz
born Abt 1399.
Trojden II Prince of Plock
born Abt 1401.
Wladislaw I Prince of Plock
born Abt 1403.
Anna Princess of Czersk
born Abt 1407.
Maria Princess of Czersk
born Abt 1409.
Katarzyna Princess of Czersk
born Abt 1411.
Ziemowit IV Prince of Czersk died 30 Apr 1426 .
Aleksandra Princess of Lithuania died 19 Jun 1434 .