Judith was the daughter of Duke
Bolesław III Wrymouth of
Poland by his second wife,
Salomea of Berg. She was probably named after either her paternal grandmother,
Judith of Bohemia, or her older half-sister, the princess of Murom. Judith was one of the youngest children of her parents; her date of birth remains unknown. According to Polish medieval chronicles, she was sent to
Hungary as a bride of the son of King
Béla II. According to the
Annales Cracovienses Compilati, this event took place in 1136; since it can be assumed that the Polish princess was younger than her betrothed, and also are known the birth dates of the youngest children of Bolesław III (
Agnes in 1137 and
Casimir in 1138), Judith in consequence could have been born between 1130 and 1135. The marriage never took place: by 1146, the engagement was broken with the consent of both parties and Judith returned to Poland. The reason for this may have been the wedding of
Mieszko (Judith's brother) with the Hungarian princess
Elisabeth (daughter of King Béla II), which sufficiently secured the Polish-Hungarian alliance. ==Margravine of Brandenburg==