Knut Otto Christian Hans Konstantin Hubertus von Kühlmann-Stumm (17 October 1916 – 19 January 1977), was a German politician for the Free Democratic Party who owned Ramholz Castle.

[1] His father served as State Secretary for Foreign Affairs,[2] who was Ambassador to the Ottoman Empire and the Netherlands.

[3][4] His maternal grandfather was Baron Hugo Rudolf von Stumm, a German industrialist, landowner, member of the state parliament and Prussian cavalry officer.

He left the FDP because of its support for the Ostpolitik of chancellor Willy Brandt,[10] joining the conservative CDU instead.

Together, they had a son:[6] Baron von Kühlmann-Stumm died in a car accident on 19 January 1977 in Bad Soden-Salmünster.