Friedrich Karl Freiherr[1] von Tettenborn (19 February 1778, in County of Sponheim – 9 December 1845, in Vienna) was a famous cavalry commander in the Austrian and Russian armies during the Napoleonic Wars.

Appointed oberst, he crossed the Vistula and Oder, joined up with general Tschernischew in Landsberg and then moved on Berlin.

From there, he was dispatched to Hamburg, occupying it on 18 March 1813 after throwing back Morand at Bergedorf on the left bank of the Elbufer.

Fahl writes of von Tettenborn at this era "he observed Hamburg as a favourable location to enrich itself and to lead a straying life.

In January 1814 he was delegated to use a single corps of light cavalry to maintain communications between the many separate Allied armies operating in France.