Nn was the daughter of Otto II von Lengbach but her mother is unknown. The date and place of her birth have not been found.
Her husband was Gerhard II von Hirschberg. They were married, but the date and place have not been found. Their three known children were Gebhard V (I, II) (c1194-1249), Gerhard IV (?-1225) and Kunigunde (?-1249).