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
Dorothea Jordan stating that in order to continue receiving that money, and retain custody, Dorothea must not return to the stage. In 1814, when a son-in-law became heavily in debt, Dorothea returned to the stage to help pay off that debt. Once the Duke received word of this, he removed their remaining daughters from her care, and took back her yearly stipend. To avoid creditors, she fled to France in 1815 and died at Saint-Cloud, near Paris, in poverty just a year later. Her notable descendants include: Dorothea Jordan Dorothea Jordan (22 November 17615 July 1816) also known interchangeably as Mrs Jordan,