On his death the titles passed to his eldest son, the third Baron. He was a Major in the Royal 1st Devon Yeomanry and fought in the Second Boer War and in the First World War. Lord Seaton married Elizabeth Beatrice (d. 1937), daughter of Sir Francis Fuller-Eliott-Drake, 2nd Baronet, of Nutwell Court and Buckland Abbey (a title which became extinct on his death in 1916), in 1887. In 1917 he assumed by Royal Licence the additional surnames of Eliott-Drake. Lord Seaton was childless and on his death in 1933 the title passed to his younger brother, the fourth Baron. He was a Major in the South Staffordshire Regiment and served in the Nile Expedition of 1884 to 1885, where he was severely wounded, in the Second Boer War and in the First World War. Lord Seaton married Caroline Mabel, daughter of Sir Arthur Pendarves Vivian, in 1904. In 1927 he assumed by Royal licence the additional surname of Vivian. He was also childless and on his death in 1955 the barony became extinct.
Another member of the Colborne family to gain distinction was the Hon. Sir Francis Colborne (1817–1895), second son of the first Baron. He was a General in the Army.