Margaret Maitland Waterlow1 
Joan Maitland Waterlow1 
From 13 April 1926, her married name became Lambourn.
Children of Joan Maitland Waterlow and George Ernest Lambourn
- Simon Lambourn+2 b. 25 Sep 1927
- Martin Lambourn+2 b. 27 Jul 1929
- Jane Esther Lambourn2 b. 27 May 1931
George Ernest Lambourn1
Children of George Ernest Lambourn and Joan Maitland Waterlow
- Simon Lambourn+2 b. 25 Sep 1927
- Martin Lambourn+2 b. 27 Jul 1929
- Jane Esther Lambourn2 b. 27 May 1931
Simon Lambourn1
He was educated at Highgate School, Highgate, London, EnglandG.1 He graduated from Trinity Hall, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Master of Arts (M.A.)1 He was registered as a Chartered Engineer (C.E.)1 He was director of Computer Offices Ltd.1 He lived in 2003 at 13 Grey Close, London, EnglandG.1
Children of Simon Lambourn and Hilary Margaret Buckley Williams
- Caroline Helen Lambourn2 b. 7 Sep 1959
- Sarah Margaret Lambourn2 b. 6 Dec 1963
Herbert J. Williams1
Child of Herbert J. Williams
Hilary Margaret Buckley Williams1
From 3 November 1951, her married name became Lambourn.
Children of Hilary Margaret Buckley Williams and Simon Lambourn
- Caroline Helen Lambourn2 b. 7 Sep 1959
- Sarah Margaret Lambourn2 b. 6 Dec 1963
Caroline Helen Lambourn1
Sarah Margaret Lambourn1
Martin Lambourn1
Children of Martin Lambourn and Diana Godfrey
- Nikolas Lambourn2 b. 1952
- Tamsin Lambourn2 b. 1954
- Charlotte Nancy Lambourn2 b. 1956
Children of Martin Lambourn and Jill Amanda Stevenson
- Giles Timothy Lambourn2 b. 1960
- Emma Fanny Lambourn2 b. 1962
- Hugo Gavin Lambourn2 b. 1963