John de Cobham1 
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume III, page 351. Hereinafter cited as The Complete Peerage.
S/Ldr. Stanley Beresford Collett1 
He fought in the First World War.1 He gained the rank of officer in the Royal Flying Corps.1 He was Assistant Solicitor then Assistant Secretary, GWR.1 He gained the rank of commander in 1931 in the City of London Squadron.1 He gained the rank of Squadron Leader in the Auxiliary Air Force.1
Colonel Frank Griffith1
Child of Colonel Frank Griffith
Olga Kathleen Griffith1
Hendon.1 Youngest.1 Her married name became Collett. She was and was killed in a flying accident at Royal Air Force Display.1 On 30 June 1934 (an unknown value.)1 She was Officer, Order of the British Empire (O.B.E.) in 1955.1
Norman Charles Collett1 
He gained the rank of officer in the Royal Naval Air Service.1
Richard Ionn Collett1 
Children of Richard Ionn Collett and Helen Alice Hayns
- Norman Ionn Collett+2 b. 4 Sep 1927
- James Masterman Collett+2 b. 5 Aug 1930
- Richard Patrick Collett+2 b. 2 Oct 1932, d. 1982
- Henry Alexander Collett+2 b. 15 Apr 1944
Harry Hayns1
Child of Harry Hayns
- Helen Alice Hayns+2 d. 1992
Helen Alice Hayns1 
From 1926, her married name became Collett.
Children of Helen Alice Hayns and Richard Ionn Collett
- Norman Ionn Collett+2 b. 4 Sep 1927
- James Masterman Collett+2 b. 5 Aug 1930
- Richard Patrick Collett+2 b. 2 Oct 1932, d. 1982
- Henry Alexander Collett+2 b. 15 Apr 1944
Norman Ionn Collett1
He was educated at Perse School, Cambridge, Cambridgeshire, EnglandG.1 He was educated at Ipswich School, Ipswich, Suffolk, EnglandG.1 He was educated at H.M.S. Conway, EnglandG.1
Children of Norman Ionn Collett and Ethne Maureen Chadwick
- Kevin Samuel Richard Collett2 b. 1955
- Norman Michael Collett2 b. 1959
- Helen Margaret Collett2 b. 1962