Saint Hedwig of Silesia , also Saint Hedwig of Andechs , a member of the Bavarian comital House of Andechs, was Duchess of Silesia from 1201 and of Greater Poland from 1231 as well as High Duchess consort of Poland from 1232 until 1238. She was canonized by the Catholic Church in 1267.
The daughter of Count Berthold IV of Andechs and his second wife Agnes of Wettin, she was born at Andechs Castle in the Duchy of Bavaria. Her elder sister, Agnes married King Philip II of France and her sister, Gertrude King Andrew II of Hungary, while the youngest Matilda, became abbess at the Benedictine Abbey of Kitzingen in Franconia, where Hedwig also received her education. Through her sister Gertrude, she was the aunt of Saint Elizabeth of Hungary.
Source: Wikipedia