He married, in 1858, Frances Arabella (d. 1903), the only child of
Sir Samuel Martin, a baron of the exchequer; they had five sons and six daughters. His daughters remained living at Runkerry until c. 1950. Their children were: •
Sir Edward Charles Macnaghten, 5th Baronet (9 October 1859 – 31 December 1914), married firstly in 1888 the Hon. Gwen Elca Violett Abbot (d.1891), daughter of
Charles Abbott, 3rd Baron Tenterden with whom he had one son, Hugh Macnaghten, who died young. He married secondly in 1894 Edith Minnie Powell, and they had two sons (the future
6th and
7th Baronets, who were both killed in
WWI), and one daughter. • Hon. Frances Helen Macnaghten (1860 – 12 March 1950). Unmarried. • Hon. Beatrice Mary Macnaghten (1862 – 12 March 1950). Unmarried. • Sir Francis Alexander Macnaghten, 8th Baronet (18 May 1863 – 1 November 1951), who married 1905 Beatrice Ritchie, daughter of
Sir William Johnstone Ritchie, 2nd Chief Justice of Canada. They had no issue. • Hon. Florence Mary Macnaghten (1864 – 26 January 1941). Unmarried. • Sir Frederic Fergus Macnaghten, 9th Baronet (16 May 1867 – 18 November 1955), who married 1915 Ada Webster. No issue. • Hon. Edith Arabella Mary Macnaghten (12 December 1865 – 16 January 1866) •
Rt. Hon. Sir Malcolm Martin Macnaghten (12 January 1869 – 24 January 1955), who married in 1899 Antonia Mary Booth, daughter of
Charles Booth. They had four children, including the 10th and further baronets. • Hon. Octavia Mary Macnaghten (1870 – 8 August 1946). Unmarried. • Hon. Anne Julia Mary Macnaghten (1872 – 7 March 1949). Unmarried. • Hon. Ethel Mary Macnaghten (1876 – 18 May 1951). Unmarried. A member of the Trade Board for Ireland. • Capt. Hon. Maurice Patrick Macnaghten (2 March 1874 – 5 May 1914), who married 1912 Sybil Torbock Graham, daughter of Col. Henry Graham of the
16th Lancers. Had no issue. He died of pneumonia in 1913 at his home 198 Queen's Gate,
Kensington,
London, and was buried at Bushmills. ==See also==