Duke John II, son of King Christian III of Denmark and brother of Frederick II. Before being separated from this, Susannah Manning was listed as Frederick II's grand daughter by Maria af Danmark og Norge. Maria is not chronicled as legitimate issue in basic online sources. Duke John had a daughter Mariae and b-days are close. Trying to research possible connections and reason for Mariae's cloistering at Itzahoe. She is said to not have issue.