Lady Sydney Montagu (1851-1932) (1851–1932) Parents Harriet Sydney Dobbs George Montagu, 6th Duke of Manchester Children Arthur Keith-Falconer, 10th Earl of Kintore Ethel Keith-Falconer, 11th Countess of Kintore Ian Keith-Falconer, Lord Inverurie Lady Hilda Keith-Falconer Siblings Ada Sydney Blackwood Lord George Francis Montagu Cecilia Grace Blackwood Stevenson Arthur Blackwood Beatrice Lucy Blackwood Algernon Blackwood Lord Robert Montagu Lord Frederick Montagu Olivia Bennet, Countess of Tankerville William Montagu, 7th Duke of Manchester Partners Algernon Keith-Falconer, 9th Earl of Kintore