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
Dorothea Jordan
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Dorothea Jordan was an Anglo-Irish actress. She was the long-time partner of Prince William, Duke of Clarence, and the mother of 10 illegitimate children by him, all of whom took the surname FitzClare
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…
Dorothea Jordan as Rosalind by William Beechey, 1787
Mrs. Jordan in her role of Peggy in The Country Girl, David Garrick's tamer adaption of Wycherley's earlier, more scandalous play The Country Wife
Portrait of the Duke of Clarence by Martin Archer Shee, 1800. Jordan was in a long-standing relationship with the third son of George III, who later inherited the throne as William IV.