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:
Albert, Duke of Prussia
Albert married first, to Dorothea (1 August 150411 April 1547), daughter of King Frederick I of Denmark, in 1526. They had six children:He married secondly to Anna Maria (1532–20 March 1568), daughter of Eric I, Duke of Brunswick-Lüneburg, in 1550. The couple had two children: