Lord Cavan married Mary Sneade Olive (1846–1905), only child of Reverend John Olive, Rector of
Ayot St Lawrence, Hertfordshire, in 1863. They had three sons and two daughters: •
Field Marshal Frederick Rudolph Lambart, 10th Earl of Cavan (1865–1946). • Lady Ellen Olive Lambart (1867–1945), died unmarried. • Lady Maud Edith Gundreda Lambart (1869–1940). She married, firstly, Henry J. Barrett, in 1892, and, secondly, Geoffrey Birkbeck. •
Captain the Honourable Lionel John Olive Lambart (1873–1940), married in 1906 an American heiress, Adelaide Douglas Randolph, and had one daughter,
Lady Edith Foxwell "The Queen of London
Cafe Society". • The Venerable
Horace Edward Samuel Sneade Lambart, 11th Earl of Cavan (1878–1950). ==References==