Lady Mary Fox Lady Mary Fox Lady Mary Fox (née FitzClarence; 19 December 1798 – 13 July 1864) was an illegitimate daughter of King William IV of the United Kingdom by his mistress Dorothea Jordan. In later life she became a writer. Mary FitzClarence was born in Bushy House as the fourth child and second daughter of the then Prince William, Duke of Clarence, and his companion Dorothea Jordan. She was "a fine looking, brown girl with a pleasant countenance and manners". In 1820, her younger sister Elizabeth was courted by Charles Richard Fox, the eldest but illegitimate son of Lord and Lady
Sophia Dorothea of Celle on the day the engagement between Sophia Dorothea and the Duke was to be announced. When told of the change in plans and her new future husband, Sophia Dorothea shouted that "I will not marry the pig snout!" (a name by which he was known in Hanover), and threw against the wall a miniature of George Louis brought for her by Duchess Sophia. Forced by her father, she fainted into her mother's arms on her first meeting with her future mother-in-law. She fainted again when presented to George Louis. On 22 November 1682, in Celle, Sophia Dorothea married her cousin,