|Born||11 December 1876|
|Died||29 September 1965(aged 88)|
|Years of service||1896 – 1939|
|Commands held||43rd (Wessex) Infantry Division
Governor & Commander-in-Chief Bermuda
|Battles/wars||Second Boer War
World War I
|Relations||Henry Hildyard (Father)
Thomas Thoroton-Hildyard (Grandfather)
The third son of General Sir Henry Hildyard, by his marriage to Annette, the daughter of Admiral James Charles Prevost, Hildyard's brothers were Harold Charles Thoroton Hildyard (born 1872) and Gerald Moresby Thoroton Hildyard (1874–1956). He also had one sister, Edith Mary Thoroton Hildyard.
Hildyard served in South Africa during the Second Boer War of 1899–1902, receiving the Queen's Medal with four clasps and the King's Medal with two clasps; from 1900 to 1903 he was employed with the South African Constabulary and served as Aide-de-camp to the Lieutenant General commanding in South Africa, from 1904 to 1905, then as ADC to the General Officer Commanding, Africa, from 1905 to 1908. He was a General Staff Officer (3rd grade) at the War Office from 1911 to 1913, then Brigade-Major in the Southern Command, 1913 to 1914, and passed the Staff College. He served in the European War of 1914–1918, was seven times mentioned in despatches, and was awarded the Distinguished Service Order and appointed CMG. He was Brigade Commander of the 2nd Rhine Brigade from 1928 to 1929, then Commander of the 43rd (Wessex) Division, Territorial Army, 1930–1934.
- Lundy, Darryl. "Sir Henry John Thoroton Hildyard". The Peerage.[unreliable source?], accessed 8 February 2011
- Marquis of Ruvigny and Raineval, The Plantagenet Roll of the Blood Royal: The Mortimer-Percy (2001 reprint), p. 309
- 'HILDYARD, Gen. Sir Reginald John Thoroton', in Who Was Who (London: A. & C. Black, 1920–2008; online ed. by Oxford University Press, December 2007, accessed 15 February 2011
- Lundy, Darryl. "General Sir Reginald John Thornton Hildyard". The Peerage.[unreliable source?], accessed 15 February 2011