Judith of Poland (Polish: Judyta Bolesławówna, Hungarian: Judit; b. c. 1130/35 – died 8 July 1171/75) was a member of the House of Piast and by marriage margravine of Brandenburg.
[citation needed] 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.
[2] 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.
[4] During her marriage, she bore her husband two sons, Otto (who later succeeded his father as Margrave of Brandenburg) in 1149, and Henry (who inherited the Counties of Tangermünde and Gardelegen) in 1150.
Only the day, 8 July, is known thanks to the Regesta Historia Brandenburgensis, which records the death in "VIII Id Jul" of "Juditha marchionissa gemma Polonorum".