Bertie served as High Steward of Abingdon and the Deputy Lieutenant of Berkshire. His father had served as Lord Lieutenant of Berkshire from 1854 until 1881 and his grandfather before him from 1826 until 1854. Upon his father's death in 1884, he succeeded to the peerage as the 7th Earl of Abingdon and the 11th Lord Norris.
Capt. Montagu Charles Francis Bertie, Lord Norreys (1860–1919), who predeceased his father. He married Rose Riversdale Glynn, granddaughter of George Glyn, 1st Baron Wolverton, with issue:
Hon. Arthur John Bertie (26 December 1861[9] – 10 January 1862), died aged 15 days[10]
Lady Alice Josephine Bertie (1865–1950), who married Sir Gerald Portal on 1 February 1890. After his death, she married Maj. Robert Reyntiens on 5 October 1897.
Lady Cecil Josephine Bertie (1873–1895), who married Brig-Gen. Paul Aloysius Kenna on 18 July 1895.
After the death of his first wife in 1873, he remarried to Gwendoline Mary Dormer (1865–1942) on 16 October 1883. Gwendoline was the daughter of James Charlemagne Dormer, a British Army officer who was only two years Bertie's senior. Together, they were the parents of four more children:[3]
Maj. Hon. Arthur Michael Cosmo Bertie (1886–1957), who married Aline Rose Ramsay, daughter of George Arbuthnot-Leslie, on 15 May 1929. After her death, he married Lilian Isabel Crackanthorpe, daughter of Charles Edward Cary-Elwes, on 7 May 1949.
Lady Elizabeth Constance Mary Bertie (1895–1987), married first Major Sigismund Trafford on 21 April 1914. After his death, she married Col. Henry Cartwright on 5 September 1956.
The Earl of Abingdon died on 10 March 1928, aged 91, at Oaken Holt in Oxfordshire, in South East England. He was buried at Abingdon Abbey in Abingdon. His widow lived to age 77 and died on 16 September 1942.
^Cokayne, George Edward, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, A. Sutton, Gloucester, 1982, volume I, p. 49.
^Trustees of the Museum (10 December 1898). Statutes and Rules for the British Museum. London: Woodfall and Kinder. p. 31 – via Internet Archive (Biodiversity Heritage Library).