(Abolished 9 November 1918)
Prince Frederick Charles of Hesse
Prince Frederick Charles was the brother-in-law of the German Emperor Wilhelm II.
Frederick Charles was elected as the King of Finland by the Parliament of Finland on 9 October 1918.
However, with the abdication of Emperor Wilhelm II of Germany ending monarchies in Germany, Finland adopted a republican constitution.
His first son Philipp, Landgrave of Hesse joined the Nazi Party in 1930, and the SA.
Stormtroopers in 1932.
In 1933 his three other brothers joined the (SS) and the SA.
Prince Philipp of Hesse became a particularly close friend of Hermann Göring, the future head of the Luftwaffe.
After Hindenburg's appointment of Adolf Hitler as Chancellor in 1933, Philipp was appointed Oberpräsident (Governor) of Hesse-Nassau, and a member of the Reichstag, and of the Prussian Staatsrat.
Philipp played an important role in the consolidation of Nazi rule in Germany.
He introduced other aristocrats to NSDAP officials and, as son-in-law of the king of Italy, was a frequent go-between for Hitler and Benito Mussolini.
As Governor of Hesse-Kassel, Philipp was complicit in the T-4 Euthanasia Program.
In February 1941, Philipp signed the contract placing the sanitarium of Hadamar Clinic at the disposal of the Reich Interior Ministry.
Over 10,000 mentally ill people were killed there.
In 1946, Prince Philipp of Hesse was charged with murder, but the charges were later dropped.

Prince Fredericks other son Prince Christoph of Hesse was a SS.
Schutzstaffel officer.
Prince Christophe was a director in the Third Reich's Ministry of Air Forces, Commander of the Air Reserves, with a rank of Oberführer in the SS.
In 1943, he was killed in an airplane accident in a war zone near Italy.
Prince Christoph was a great-grandson of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha through their daughter Victoria, Princess Royal, wife of Frederick III, German Emperor.
Christoph married Princess Sophie of Greece and Denmark.
Princess Sophie was the youngest daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg, and the sister of the future Prince Philip, Duke of Edinburgh.

Prince Wilhelm of Hesse, was heir to the Hesse-Philippsthal line.
Prince Wilhelm was the eldest child of Prince Chlodwig of Hesse and Princess Caroline of Solms-Hohensolms-Lich.
In 1932 he joined the Nazi party and SS rising to the rank SS-Hauptsturmführer.
Prince Wilhelm married Princess Marianne, the daughter of Prince Friedrich Wilhelm of Prussia.
During WWII Prince Wilhelm refused to join an SS unit, instead switching to the regular German Army, where he became a captain of infantry.
He was killed in action during the fighting at Gor on the Eastern Front.
(Abolished 9 November 1918)
Prince Frederick Charles of Hesse
Prince Frederick Charles was the brother-in-law of the German Emperor Wilhelm II. Frederick Charles was elected as the King of Finland by the Parliament of Finland on 9 October 1918. However, with the abdication of Emperor Wilhelm II of Germany ending monarchies in Germany, Finland adopted a republican constitution. His first son Philipp, Landgrave of Hesse joined the Nazi Party in 1930, and the SA. Stormtroopers in 1932. In 1933 his three other brothers joined the (SS) and the SA. Prince Philipp of Hesse became a particularly close friend of Hermann Göring, the future head of the Luftwaffe. After Hindenburg's appointment of Adolf Hitler as Chancellor in 1933, Philipp was appointed Oberpräsident (Governor) of Hesse-Nassau, and a member of the Reichstag, and of the Prussian Staatsrat. Philipp played an important role in the consolidation of Nazi rule in Germany. He introduced other aristocrats to NSDAP officials and, as son-in-law of the king of Italy, was a frequent go-between for Hitler and Benito Mussolini. As Governor of Hesse-Kassel, Philipp was complicit in the T-4 Euthanasia Program. In February 1941, Philipp signed the contract placing the sanitarium of Hadamar Clinic at the disposal of the Reich Interior Ministry. Over 10,000 mentally ill people were killed there. In 1946, Prince Philipp of Hesse was charged with murder, but the charges were later dropped.
Prince Fredericks other son Prince Christoph of Hesse was a SS. Schutzstaffel officer. Prince Christophe was a director in the Third Reich's Ministry of Air Forces, Commander of the Air Reserves, with a rank of Oberführer in the SS. In 1943, he was killed in an airplane accident in a war zone near Italy. Prince Christoph was a great-grandson of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha through their daughter Victoria, Princess Royal, wife of Frederick III, German Emperor. Christoph married Princess Sophie of Greece and Denmark. Princess Sophie was the youngest daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg, and the sister of the future Prince Philip, Duke of Edinburgh.
Prince Wilhelm of Hesse, was heir to the Hesse-Philippsthal line. Prince Wilhelm was the eldest child of Prince Chlodwig of Hesse and Princess Caroline of Solms-Hohensolms-Lich. In 1932 he joined the Nazi party and SS rising to the rank SS-Hauptsturmführer. Prince Wilhelm married Princess Marianne, the daughter of Prince Friedrich Wilhelm of Prussia. During WWII Prince Wilhelm refused to join an SS unit, instead switching to the regular German Army, where he became a captain of infantry. He was killed in action during the fighting at Gor on the Eastern Front.
Former German nobility in the Nazi Party