Charles Vernon Hume 
Cicely Mary Marshall
Evelyn Adela Marshall
Olive Edith Marshall 
Her married name became Johnston-Stewart.
Children of Olive Edith Marshall and Admiral Robert Johnston-Stewart
- Robert Hathorn Johnston-Stewart b. 17 Dec 1904
- Keith Hathorn Johnston-Stewart b. 3 Mar 1907
Admiral Robert Johnston-Stewart
Children of Admiral Robert Johnston-Stewart and Olive Edith Marshall
- Robert Hathorn Johnston-Stewart b. 17 Dec 1904
- Keith Hathorn Johnston-Stewart b. 3 Mar 1907
Robert Hathorn Johnston-Stewart
Keith Hathorn Johnston-Stewart
Oonah Sladen
Her married name became Johnston-Stewart.
Colonel Guy Stewart St. Aubyn1 
He fought in the Isazai Expedition in 1892.2 He fought in the Mashonaland Expedition in 1896.2 He fought in the Boer War between 1899 and 1900.2 He gained the rank of Colonel in the King’s Royal Rifle Corps.2 He was appointed Officer, Order of the British Empire (O.B.E.) in 1919.2
Children of Colonel Guy Stewart St. Aubyn and Florita Catherine Grenfell
- Barbara Edith St. Aubyn2 b. 25 Mar 1904, d. 19 Jun 1982
- Juliet Mary St. Aubyn+2 b. 16 Sep 1905
- Edward FitzRoy St. Aubyn2 b. 12 Mar 1907, d. 24 May 1943
- Violet Susan May St. Aubyn+2 b. 24 Feb 1909, d. 20 Dec 2009
Florita Catherine Grenfell1 
From 4 July 1899, her married name became St. Aubyn.
Children of Florita Catherine Grenfell and Colonel Guy Stewart St. Aubyn
- Barbara Edith St. Aubyn2 b. 25 Mar 1904, d. 19 Jun 1982
- Juliet Mary St. Aubyn+2 b. 16 Sep 1905
- Edward FitzRoy St. Aubyn2 b. 12 Mar 1907, d. 24 May 1943
- Violet Susan May St. Aubyn+2 b. 24 Feb 1909, d. 20 Dec 2009