Braybrooke was born in 1894 in
Reading, Berkshire to William Alfred Rossi Braybrooke and Alice Charlotte Chase. He was the eldest of three brothers, with Micheal Knollys (1899–1991) the middle and Arthur Rossi (1902–1989) the youngest. Both his father, William, and his brother, Arthur, were priests in the Church of England. Braybrooke was also a great-great-grandson of the Honourable and Reverend Francis Knollys, Vicar of
Burford from 1771 to 1826. Rev. Francis Knollys was the son of Charles Knollys, 5th
Earl of Banbury. Braybrooke was also a great-great-grandson of the prominent sculptor
John Charles Felix Rossi RA (1762–1839), whose work can be found in
St Paul's Cathedral,
Buckingham Palace and
The Royal Opera House Covent Garden. Braybrooke was married three times, firstly to Lettice Marjorie Bellairs in 1921, secondly to Ida Cooper in 1929, and thirdly to Rita Ellen Constance Rivers Cripps (née Hatherell) in 1937. His son by his first marriage, Neville Braybrooke, also a writer, edited
The Letters of J. R. Ackerley (1975) and wrote, with his wife June,
Olivia Manning: A Life (2004). ==Works==