Sophia Sidney, Baroness De L'Isle and Dudley

The Right Honourable The Lady De L'Isle and Dudley
Lady De L'Isle and Dudley in 1832, by Andrew Morton
Born	Sophia FitzClarence 25 August 1796 Somerset Street, London, England
Died	10 April 1837 (aged 40) Kensington Palace, London, England
Noble family	FitzClarence
Spouse(s)	Philip Sidney, 1st Baron De L'Isle and Dudley ​ ​ (m. 1825)​
Issue	Adelaide Sidney Ernestine Sidney Sophia Sidney Philip Sidney, 2nd Baron De L'Isle and Dudley
Father	William IV
Mother	Dorothea Jordan
Occupation	State Housekeeper

Sophia Sidney, Baroness De L'Isle and Dudley (née FitzClarence; 25 August 1796 – 10 April 1837) was the eldest illegitimate daughter of William IV of the United Kingdom and his longtime mistress Dorothea Jordan. She was married to Philip Sidney, 1st Baron De L'Isle and Dudley, and had four surviving children. Shortly before her death in 1837, she served as State Housekeeper in Kensington Palace.