Tonmon married Baroness Anslow Hilda Rose Montgomerie on 22 Feb 1881 in Belgravia, Middlesex, England. Hilda (daughter of 13th Earl of Eglinton Archibald William Montgomerie and Countess of Eglinton Adela Caroline Harriett Capel) was born on 7 Dec 1860 in Midlothian, Scotland; died on 18 Jun 1928 in Eton, Buckinghamshire, England. [Group Sheet] [Family Chart]