Career
Lord Eglinton married Janet Lucretia Cuninghame on 13 November 1873. They 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 - d 9 May 1903)
Captain Francis Cuninghame Montgomerie (b 25 January 1887 - 16 March 1950)
Lord Eglinton died on 10 August 1919, aged 71.