Duke William Frederick Philip of Württemberg

William Frederick Philip, Duke of Württemberg (27 December 1761, Stettin – 10 August 1830, Schloss von Stetten im Remstal) was a prince of the House of Württemberg and a minister for war.

William was the fourth son of Frederick II Eugene, Duke of Württemberg and Sophia Dorothea of Brandenburg-Schwedt, eldest daughter of Frederick William, Margrave of Brandenburg-Schwedt and Princess Sophia Dorothea of Prussia, a niece of Frederick II of Prussia.

In 1779 he joined the Royal Danish Army and quickly rose to the rank of Oberst. In 1781 he commanded his own regiment, being promoted to major general in 1783, moved to the Danish Foot Guards in 1785 and promoted to lieutenant general in 1795. In 1801 he became governor of Copenhagen and later the same year faced the Battle of Copenhagen in that role.

In 1806 he paid 10,000 Reichstaler to leave the Danish army. His brother Frederick had just been made king of Württemberg and in Stuttgart made William a field marshal and Württemberg's minister for war. From 1810 to 1821 William temporarily lived in his manor house at Hirrlingen near Rottenburg but more often in the Schloss Stetten in Remstal. On 29 June 1811 he took on Freiherr Friedrich von Phull as vice-president of the War Department (and de facto Minister for War, though William remained minister de jure until 1815).

In 1815, on leaving office, William shifted to studying science and successfully practised as a physician. In 1817 the University of Tübingen awarded him an honorary degree in medicine. As a member of the royal house of Württemberg, William also held a seat in the Kammer der Standesherren (House of Lords) of the Württembergische Landstände parliament from 1819 to his death in 1830.

On 23 August 1800, in Coswig, Frederick married one of his mother's ladies in waiting, Wilhelmine Freiin von Tunderfeld-Rhodis (1777–1822), daughter of Baron Karl August Wilhelm von Tunderfeld-Rhodis. She was a scion of a military family from Sweden, originally from the Baltic.

The couple had six children, only three of whom reached adulthood:

• Count Alexander of Württemberg (1801–1844), poet
  ∞ Helene, Countess Festetics (1812–1886), daughter of Ladislas Graf Festetics of Tolna
• August (1805–1808)
• Wilhelm, 1st Duke of Urach, Count of Württemberg (1810–1869)
  ∞ (I.) Théodolinde de Beauharnais (1814–1857); ∞ (II.) Florestine of Monaco (1833–1897)
• Friedrich August (1811–1812)
• Franz (1814–1824)
• Marie, Countess of Württemberg (1815–1866) ∞ Wilhelm, Count of Taubenheim (1805–1894)

Since this was a morganatic marriage, on 1 August 1801 William renounced his descendants' claim to the throne of Württemberg. This had an effect in 1921 on the death of William II of Württemberg, when his descendants were excluded from inheriting, but by then the Kingdom of Württemberg had itself been superseded.

• Grand Cross of theOrder of the Württemberg Crown
• Grand Cross of the Württemberg Military Merit Order
• 1803 Knights' Cross of the Danish Order of the Elephant
• Grand Cross of the French Legion of Honour