She was the daughter of
Captain Boyd Alexander Cuninghame of the
Royal Navy and his Australian wife, Mary ( Wilkinson). She married the Honourable George Montgomerie on 13 November 1873. The couple had several children: • Lady Georgiana Theresa Montgomerie (d. 21 August 1938) • Lady Edith Mary Montgomerie (d. 8 September 1947) •
Archibald Seton Montgomerie, 16th Earl of Eglinton (23 June 1880 – 22 April 1945) • William Alexander Montgomerie (29 October 1881 – 9 May 1903) • Captain Francis Cuninghame Montgomerie (25 January 1887 – 16 March 1950) George Montgomerie succeeded his elder brother as 15th Earl in 1892 and died in 1919. ==World War I==