Euphemia of Greater Poland

Euphemia of Greater Poland (Polish: Eufemia Odonicówna) (c. 1230 – 15 February after 1281), was a Polish princess member of the House of Piast from the Greater Poland branch and by marriage was Duchess of Kalisz, Wieluń and Opole-Racibórz.

Euphemia was the youngest child of Władysław Odonic and his wife Jadwiga, disputed daughter of Mestwin I, Duke of Pomerania and Swinisław, daughter of Mieszko III the Old.

Euphemia's date of birth is unknown. In literature it claims Euphemia was born around 1230. It is most likely she was born between (1226–1230), fitting in with the dates of birth of her siblings and dates of death of her parents.

Euphemia and her siblings married well. Her brother Przemysł I of Greater Poland married Elisabeth, daughter of Henry II the Pious. Another brother Bolesław the Pious married Helen, daughter of Béla IV of Hungary. Euphemia's only sister, Salome of Greater Poland married Konrad I, Duke of Silesia-Glogau.

Euphemia married in 1251 Władysław Opolski, son of Casimir I of Opole and Viola, Duchess of Opole. The couple were related in the fourth degree, so they needed a papal dispenstion in order for the marriage to be considered valid. It is unknown whether the couple got a papal dispensation.

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