Editing Mieszko II Lambert (section)

==Marriage and issue==
In [[Merseburg]] ca. 1013, Mieszko II married [[Richeza of Lotharingia|Richeza]], daughter of Count Palatine [[Ezzo, Count Palatine of Lotharingia]] and [[Matilda of Germany, Countess Palatine of Lotharingia]].{{sfn|Wilson|2016|loc=Tree 2}} They had:
#[[Richeza of Poland, Queen of Hungary|Richeza]] (b. 22 September 1013 – d. 21 May 1075), married by 1039/42 to King [[Béla I of Hungary]]{{sfn|Davies|1986|p=483}}
#[[Casimir I the Restorer]] (b. 25 July 1016 – d. 19 March 1058){{sfn|Davies|1986|p=483}}
#[[Gertrude of Poland|Gertruda]] (b. 1025 – d. Kiev, 4 January 1108), married by 1043 to Grand Prince [[Iziaslav I of Kiev]]{{sfn|Davies|1986|p=483}}
#possibly [[Agatha, wife of Edward the Exile|Agatha]], wife of [[Edward the Exile]], whose origins are unknown. One theory that has been put forward is that she was the daughter of Mieszko II and Richeza.<ref>Michael Anne Guido and John P. Ravilious, "From Theophanu to St. Margaret of Scotland: A study of Agatha's ancestry", Foundations, vol. 4 (2012), pp. 81-121.{{unreliable source|date=November 2022}}</ref>