Agafia of Rus Princess of Mazovia (1190–1247) Parents Yaroslava Rurikovna Svyatoslav III Igorevich Children Bolesław I of Masovia Casimir I of Kuyavia Eudoxia of Masovia Siemowit I of Masovia Judith of Masovia Dubrawka of Masovia Partners Konrad I of Masovia
