Lt.-Cdr. William Gerard Drogo Montagu1 
He was educated at Stowe School, Buckingham, Buckinghamshire, EnglandG.1 He was educated at Chillon College, SwitzerlandG.1 He gained the rank of Lieutenant-Commander in the Royal Navy.1
Children of Lt.-Cdr. William Gerard Drogo Montagu and Charlotte Delma Calburn
- Charles Edward Drogo Montagu+2 b. 15 Dec 1952
- Francis Gerard Drogo Montagu2 b. 15 Dec 1952
- James William Drogo Montagu+2 b. 12 Feb 1954
Frank Reitmeyer Calburn1
Child of Frank Reitmeyer Calburn
- Charlotte Delma Calburn+2 b. 1927, d. 9 Jun 2017
Charlotte Delma Calburn1 
From 29 July 1950, her married name became Montagu. She lived in 2003 at 7 Shernfold Park, Frant, Sussex, EnglandG.1
Children of Charlotte Delma Calburn and Lt.-Cdr. William Gerard Drogo Montagu
- Charles Edward Drogo Montagu+3 b. 15 Dec 1952
- Francis Gerard Drogo Montagu3 b. 15 Dec 1952
- James William Drogo Montagu+3 b. 12 Feb 1954
Charles Edward Drogo Montagu1
He was educated at Tonbridge School, Tonbridge, Kent, EnglandG.1 He was educated at Corpus Christi College, Oxford University, Oxford, Oxfordshire, EnglandG.1
Children of Charles Edward Drogo Montagu and Marie-Jocelyne Dardenne
- Edward Harry Montagu2 b. 1990
- Emily Frances Montagu2 b. 1993
- Robert William Montagu2 b. 29 Sep 1997
Marie-Jocelyne Dardenne1
From 1986, her married name became Montagu.
Children of Marie-Jocelyne Dardenne and Charles Edward Drogo Montagu
- Edward Harry Montagu2 b. 1990
- Emily Frances Montagu2 b. 1993
- Robert William Montagu2 b. 29 Sep 1997
Edward Harry Montagu1
Robert William Montagu1
Emily Frances Montagu1
Francis Gerard Drogo Montagu1
He was educated at Tonbridge School, Tonbridge, Kent, EnglandG.1 He was educated at Pembroke College, Cambridge University, Cambridge, Cambridgeshire, EnglandG.1 He was a practising solicitor.1 He lived in 2003 at White Lodge, Ropers Lane, Wrington, Somerset, EnglandG.1