William I of Württemberg
On 24 January 1816, in Saint Petersburg, he married his first cousin, Grand Duchess Catherine Pavlovna of Russia (1788–1819), daughter of Emperor Paul I of Russia (1754–1801) and Princess Sophie Dorothea of Württemberg (1759–1828). The couple had two children:
Archduchess Maria Dorothea of Austria
Maria Dorothea married Philippe, Duke of Orléans, eldest son of Philippe, Count of Paris and his wife Princess Marie Isabelle of Orléans, on 5 November 1896 in Vienna.