He was the son of Christoffer Clausen Sehestedt til Nislevgaard paa
Fyn (d. 1699). After the death of his father, he inherited the Nislevgaard manor. In 1701 he was married to Charlotte Amalie Gersdorff (b. 1685 d. 1751). Through the marriage, he came to possess Ravnholt manor. His marriage was childless. {{cite web|url= https://runeberg.org/dbl/13/0413.html |title= Rantzau, Christian Greve, 1683-1771|website= Dansk biografisk Lexikon ==References==