|Relationships||Father: Rear Admiral Victor Alexander Montagu RN CB (1841-1915)|
Mother: Agneta Harriet Yorke, daughter of Charles Philip Yorke, 4th Earl of Hardwicke
Spouse: Alberta Sturges (m.1905, d.1951), daughter of William Sturges, of New York, USA
Ella Lilian Amiya Corbin (m.1952, d. 1986), daughter of George Sully, of North Petherton, Somerset
Children: Victor Montagu, 10th Earl of Sandwich (1906-1995) m. 1st. Maud Rosemary, daughter of Major Ralph Peto m. 2nd. Anne Holland-Martin, daughter of The 9th Duke of Devonshire
F/O William Drogo Sturges Montagu RAuxAF (1908-1940), m. 1st. Tanis Eva Bulkeley Guinness (m.1931. div.1935. d. 1993) m. 2nd. Janet Gladys Campbell (m.1935)
Mary Faith Montagu (1911-1983), m. 1st. Philip Booth Nesbitt, of Wilderness House, Carmel, California, (d. 1953) m. 2nd. Cdr Sir Michael Culme-Seymour, 5th Baronet.
Elizabeth Montagu (b.1917)
All children born of the first marriage.