Maria Dobroniega was a princess of Kievan Rus' who became a duchess of Poland. Wikipedia
Died: December 13, 1087
Grandchildren: Bolesław III Wrymouth, Zbigniew of Poland, Vladislaus I, Duke of Bohemia, and more
Parents: Vladimir the Great and Anna Porphyrogenita
Children: Świętosława of Poland, Mieszko Kazimierzowic, Ladislaus I Herman, and more
Siblings: Yaroslav the Wise
Spouse: Casimir I the Restorer (m. 1041)