Euphrosyne's paternal grandparents were Mieszko I Tanglefoot and his wife Ludmilla, a disputed Bohemian princess from the Přemyslid dynasty.
Mieszko was son of Władysław II the Exile, Duke of High Poland and his wife Agnes of Babenberg.
The historian J. Horwat put forward another hypothesis, under which Viola could be a Hungarian princess, daughter of King Béla III (from his second marriage with Marguerite of France[2]), or his son and successor Emeric.
She had two brothers and a sister: Mieszko II the Fat, Władysław Opolski and Wenzeslawa of Opole, who became a nun.
Euphroyne returned to Kuyavia and lived out the rest of her days in Brześć Kujawski where she died on 4 November 1292 and was buried.