Vasilko I Svyatoslavich Duke of Polotsk 
Vasilko I Svyatoslavich Duke of was born about 1085 in Polotsk, Byelorussia. He died about 1144.
He had a biological daughter named Mariya Vasilkovna of.
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Children
Mariya Vasilkovna of Polotsk
Mariya Vasilkovna of was born about 1120 in Polotsk, Byelorussia. She died in April 1164.
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