Mary Churchill, Duchess of Montagu wife of John Montagu, 2nd Duke of Montagu (1689-1751) (1689–1751) Parents Sarah Churchill, Duchess of Marlborough John Churchill, 1st Duke of Marlborough Children Edward Montagu Churchill Montagu, Marquess of Monthermer Mary Montagu, Duchess of Montagu Isabella Montagu, Duchess of Manchester John Montagu, Marquess of Monthermer George Montagu Siblings Henrietta Churchill, 2nd Duchess of Marlborough Elizabeth Churchill, Countess of Bridgewater Anne Churchill, Countess of Sunderland John Churchill, Marquess of Blandford Lord Charles Churchill Harriet Churchill Barbara FitzRoy Partners John Montagu, 2nd Duke of Montagu
