Euphrosyne of Opole Duchess consort of Kujavia and later Duchess consort of Pomerania (1228–1292) Parents Viola, Duchess of Opole Casimir I of Opole Children Siemowit, Duke of Kuyavia-Brieg Euphemia of Kuyavia Władysław I the Elbow-high Casimir II of Łęczyca Siblings Więcesława Mieszko II the Fat Vladislaus I of Opole Partners Mestwin II Casimir I of Kuyavia