Sophia Sidney, Baroness De L'Isle and Dudley, 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
Lady De L'Isle and Dudley in 1832
William IV drawn by his daughter Sophia in 1837
Philip Sidney, 2nd Baron De L'Isle and Dudley, was an English hereditary peer.
Sophia Sidney, Baroness De L'Isle and Dudley
…20 September 1904), married her first cousin, Frederick Charles George FitzClarence-Hunloke, son of George FitzClarence, 1st Earl of Munster, no issue Philip Sidney, 2nd Baron De L'Isle and Dudley (28 January 1828 – 17 February 1898), grandfather of the 1st Viscount De L'Isle Ernestine Wellington Sidney (9 January 1834 – 20 September 1910), married…
Philip Sidney, 2nd Baron de Lisle and Dudley