Society in 1910. He was also a member of the Australian Club for over 50 years and was known for his after-dinner speeches on the early days of Sydney. Personal life He married Margaret Wharton MacClennan (–1876), the third daughter of John MacClennan, in September 1858. They eventually had four sons and six daughters, including: James Wharton Cox (1859–1911), also a physician. Oswald MacClennan Cox (1860–1864), who died young. Millicent Emma Cox (1862–1931), who married Montague Bertie, 12th Earl of Lindsey, the only son of Montague Bertie, 11th Earl of Lindsey, in 1890. Allaster Edward Cox (1864–1908), a graduate from the University of Edinburgh Medical School in 1889; he was a Lt. in the Australian Light Horse Regiment. Arthur Brooks Cox (1866–1924), a dental surgeon who married Laura Richmond Campbell (1868–1954), a daughter of Alexander Campbell of Rosemont, in 1894. Constance Margaret Cox (1868-1940), who married Charles Alison, founder of Wyong, New South Wales, and moved to England where they died. Elinor Mary Cox (1870-1949), who married William Martins Le Poer Trench, a son of Col. Hon. William Le Poer Trench and grandson of William Trench, 3rd Earl of Clancarty, in 1891. After his death, she married her late husband's cousin, Hon. Sydney Trench, a son of Hon. Frederic Sydney Charles Trench (heir apparent to the 2nd Lord Ashtown) and Lady Anne Le Poer Trench (eldest daughter of the 3rd Earl of Clancarty), in 1905. After his death a month later, she married, thirdly, to Brig.-Gen. Ronald Campbell Maclachlan in 1908; Maclachlan was killed in action in 1917 during World War I. Margaret May Cox (1874–1935), who married Archibald J.C. Galletly, manager of the Bank of Montreal in British Columbia, in 1905. Maria Lilian Cox (1876–1959), who married Lestock Frederick Reid Livingstone-Learmonth, son of Somerville Livingstone-Learmonth and grandson of Thomas Livingstone Learmonth, in 1898. Jane Judith Cox (1876–1954) After the death of Cox's first wife in 1876, he married Mary Frances Benson (1850–1902), a daughter of Frances Maria Benson and William Benson, in 1878. Mary died in 1902 and he married Emma Sarah Gibbes (1869–1955), the widow of William Charles Valentine Gibbes, at St. Philips Church in August 1903. Together, they were the parents of one daughter Laurel Lilian Cox (1910-1978). Cox died on 29 September 1912 in the Sydney suburb of Mosman. Descendants Through his daughter Millicent, he was a grandfather of Lady Muriel Felicia Vere Bertie (d. 1981)