Sophia Sidney, Baroness De L'Isle and Dudley

Sophia Sidney, Baroness De L'Isle and Dudley (née FitzClarence; August 1796 – 10 April 1837) was the eldest daughter of William IV of the United Kingdom and his longtime mistress Dorothea Jordan.

On 13 August 1825, she married Philip Sidney, later an M.P. and the 1st Baron De L'Isle and Dudley of Penshurst in the County of Kent.

She bore four children, three daughters and a son:^[1]

• Adelaide Augusta Willhelmina Sydney, married her first cousin, Frederick Charles George FitzClarence-Hunloke, son of George FitzClarence, 1st Earl of Munster, no issue
• Ernestine Wellington Sidney, married Philip Perceval; mother of Major Sir Philip Hunloke, who was the father of Lt.-Col. Henry Philip Hunloke
• Sophia Philippa Sidney, married Alexander, Graf von Kielmannsegg, a great-grandson of Johann Ludwig, Reichsgraf von Wallmoden-Gimborn (illegitimate son of George II of Great Britain)
• Philip Sidney, 2nd Baron of De L'Isle and Dudley of Penshurst (1828–1898), grandfather of the 1st Viscount De L'Isle

William IV drawn by his daughter Sophia de L'Isle and Dudley in early 1837

She died in childbirth in 1837, just after drawing a sketch of her ailing father. She was his favourite child and her death caused him intense grief. She was remembered as a woman of great wit, charm and gaiety.

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