Isabella Markham was born on 28 March 1527[REF] in Ollerton, Nottinghamshire, England, the daughter of Sir John Markham of Cotham (before 1486- 1559) and his third wife, Anne Strelley [REF].
The Markhams were an ancient family, who traced their agnatic line of descent from Claron, who had held the manor of West Markham at the time of the Norman Conquest in 1066.