Lady Mary Tudor (16 October 1673 – 5 November 1726) was an actress and natural daughter of King Charles II of England by his mistress, Mary "Moll" Davies, an actress and singer.
On 18 August 1687, Lady Mary married Edward Radclyffe, 2nd Earl of Derwentwater (9 December 1655 – 29 April 1705) by whom she had four children:
James Radclyffe, 3rd Earl of Derwentwater (1689–1716)
Lady Mary Tudor Radclyffe
Charles Radclyffe (3 September 1693 – 8 December 1746)
Hon.
Francis RadclyffeMary separated from Lord Derwentwater in 1700, reportedly due to her unwillingness to convert to Roman Catholicism.On 23 May 1705, shortly after Lord Derwentwater's death, she married secondly, to Henry Graham.
Graham died on 7 January 1707.
A few months later, on 26 August, Lady Mary married Major James Rooke.