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 of Anhalt-Zerbst Dorothea thus became the ancestress of the "New House of Brunswick", which became extinct in 1873. The family tree of the Duchess, as of 1617, can still be found in the library in Wolfenbüttel. From her marriage with Augustus, Dorothy had the following children: Dorothea of Anhalt-Zerbst Dorothea von Anhalt-Zerbst (25 September 1607, Zerbst – 26 September 1634, Hitzacker) was a member of the House of Askanier and a princess of Anhalt-Zerbst and by marriage Duchess of Brunswick-Wolfenbüttel. Dorothea was the daughter of Prince Rudolf of Anhalt-Zerbst (1576–1621) from his first marriage to Dorothea Hedwig (1587–1609), daughter of the Duke