Hermann Anton Leo Karl, Prince of Hatzfeldt, Duke of Trachenberg (German: Hermann Fürst[a] von Hatzfeldt, Herzog[b] zu Trachenberg; 4 February 1848 – 14 January 1933) was a German nobleman, member of the House of Hatzfeld, civil servant and politician.

[8] During World War I, Hatzfeldt was a candidate for Governor-General of occupied Poland; however, Hans Hartwig von Beseler was chosen instead.

In opposition to Paul von Hindenburg and General Erich Ludendorff, he campaigned for a negotiated peace with the Entente Powers.

On 18 June 1872, Hatzfeldt married Countess Nathalie von Benckendorff (Schandau, 7 September 1854 – Trachenberg, 9 March 1931) in Berlin.

She was a daughter of Russian general Konstantin Konstantinovič von Benckendorff and Princess Louise of Croÿ-Dülmen, and served as Chief Court Mistress of Empress Frederick.

[10][11] Nathalie's older brother was Count Alexander von Benckendorff; Russian ambassador to the United Kingdom during World War I, and she was also a second cousin of Archduchess Isabella of Teschen through her mother's family.