John Markham British Royal Navy admiral (1761-1827) (1761–1827) Parents Sarah Goddard William Markham Children Frederick Markham Siblings George Markham Frederica Murray, Countess of Mansfield Anne Katherine Markham Alicia Harrietts Markham Henrietta Sarah Markham Cecilia Markham Georgina Markham David Markham Osborne Markham Robert Markham William Markham Elizabeth Katherine Markham Partners Maria Rice
