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:
Princess Charlotte of Saxe-Hildburghausen
On 28 September 1805, she married Prince Paul of Wurttemberg in an extravagant wedding, but it was not a happy marriage. They had numerous arguments, and Paul was said to have many mistresses, with whom he had several affairs. However, during their marriage, they had five children:The couple separated soon after the birth of their fifth child. The idea of divorce was rejected by the King of Württemberg. Charlotte lived in a house called Sovereignty in Hildburghausen. Her eldest daughter, Princess Charlotte, visited her there quite often. Her brother, Frederick, was also a frequent visitor.