 Her father was Oswald Smith (7 July 1794–18 June 1863), of Blendon Hall, Bexley, Kent (Bexley being annexed to London only in 1894) and her mother was Henrietta Mildred Hodgson (6 January 1805–19 November 1891).Her paternal grandparents were George Smith and wife Frances Mary Mosley, daughter of Sir John Parker Mosley, 1st Baronet, and wife Elizabeth Bayley, granddaughter of Nicholas Mosley and wife Elizabeth Parker, and sister of Oswald Mosley, 2nd Baronet, great-great-grandfather of Oswald Mosley.On 28 September 1853, she married Claude Bowes-Lyon.