Frederica Murray, Countess of Mansfield (born Frederica Markham; 1774 – 29 April 1860), formerly Frederica Markham, was the wife of David William Murray, 3rd Earl of Mansfield.
Frederica was one of the seven daughters of William Markham, Archbishop of York, and his wife, the former Sarah Goddard. She also had six brothers, one of whom was Admiral John Markham. Another, George, was Dean of York.
As her father was a very close friend of David Murray, 2nd Earl of Mansfield, Frederica might possibly be named after the first wife of the 2nd Earl who was Countess Henrietta Frederica.
In 1796 her husband succeeded his father, David Murray, 2nd Earl of Mansfield, as Earl of Mansfield; he inherited Kenwood House in Camden, London. The family also had homes in Scotland and Ireland. The following year, on 16 September 1797, he married Frederica.
They had nine children:
The countess's father, the Archbishop of York, died in 1807. The countess is thought to have been responsible for extensive works carried out on Kenwood House in the period 1813âÂÂ1816, which necessitated a doubling of staff.