Background
Born in 1897 to Charles Warden Sergison and Florence Emma Louise Hanbury-Tracy, Cynthia Sergison married Viscount Brookeborough (9 June 1888 – 18 August 1973), son of Sir Arthur Douglas Brooke, 4th Baronet
Born in 1897 to Charles Warden Sergison and Florence Emma Louise Hanbury-Tracy, Cynthia Sergison married Viscount Brookeborough (9 June 1888 – 18 August 1973), son of Sir Arthur Douglas Brooke, 4th Baronet
And Gertrude Isabella Batson, on 3 June 1919. Lord and Lady Brookeborough had three sons, two of whom were killed in action during World World War World War II They were:
Lieutenant Basil Julian David Brooke (18 April 1920 - March 1943 (Killed in action)
John Warden Brooke, 2nd Viscount Brookeborough (9 November 1922 – 5 March 1987)
Lieutenant Henry Alan Brooke (29 October 1923 - April 1945) (Killed in action)
In World World War II she was Senior Commandant of the Auxiliary Territorial Service during the Second World War. In 1959 she was invested as a Dame Commander of the Order of the British Empire (Dame Commander of the Order of the British Empire).
She died on 2 March 1970, aged 72.
After her death Lord Brookeborough married Sarah Eileen Bell, daughter of Henry Healey, of Belfast, and widow of Cecil Armstrong Calvert, Fellowship of the Royal College of Surgeons, former director of neurosurgery at the Royal Victoria Hospital, Belfast.