Mieszko's first appearance is in the document "Dagome iudex" (ca. 991/92), alongside with his parents and brother Lambert.
Mieszko I | Mieszko | Mieszko Talarczyk | Mieszko Mieszkowic | Mieszko, Duke of Lubusz | Lambert Mieszkowic |
Lambert's first appearance was in the document called "Dagome iudex" (ca. 991–92), alongside with his parents and brother Mieszko.
Świętopełk is only named in the chronicles of Thietmar of Merseburg; he was omitted in the document "Dagome iudex" (ca. 991/92), were are named his parents and full-brothers Mieszko and Lambert, a fact who indicated that he maybe was dead by that time, in or before 991.