Casimir I Duke Of Poland UNKNOWN & Dobronegra Mariya Vladimirovna Kiev 
They had a son named Herman I, Duke Of Poland.
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Personal Details
Casimir I Duke Of Poland UNKNOWN
Casimir I Duke Of Poland was born on July 25th, 1016 in Krakow,POLAND. He died at the age of 42 on November 28th, 1058.
Dobronegra Mariya Vladimirovna Kiev
Dobronegra Mariya Vladimirovna was born in 1011 in Kiev,UKRAINE. She died at the age of 76 in 1087.
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Children
Herman I, Duke Of Poland Wladislaw
Herman I, Duke Of Poland was born in 1043 in Krakow,POLAND. He died at the age of 59 on June 4th, 1102 in Krakow,POLAND.