Prince Frederik of Hesse, Landgrave Friedrich of Hesse-Cassel (24 May 1771 – 24 February 1845) was a Danish-German nobleman, field marshal and governor-general of Norway (1810–1813) and the same in the duchies of Schleswig and Holstein (1836–1842).

The son was named Christian Friederichsen (23 November 1803 in Moldened near the city of Schleswig - 29 August 1866 in Copenhagen, Denmark).

By patent of 23 October 1819, Friederichsen was admitted to the Danish nobility with the name Løvenfeldt (Lovenfeldt) with seniority from 11 July 1815.

He headed the King's Regiment from 1795 to 1800, and from 1800 to 1808 Prince Frederick was governor in Rendsborg and inspector general for the footmen in the duchies of Schleswig and Holstein.

The reason was that the governor-general, Duke Christian August of Schleswig-Holstein-Sonderburg-Augustenburg was suspected to drop his loyalty to King Frederick VI in order to be adopted as the Swedish throne heir.

When France suffered a loss at the Battle of Leipzig, Frederick's corps had to retreat, and in December 1813 he led his troops from Rostock to Rendsborg, saving the army from annihilation.

[citation needed] This attack was abandoned after the peace settlement between Sweden and Denmark-Norway, the Treaty of Kiel of 14 January 1814.