George John Campbell, Earl of Campbell (1763-1764) (1763–1764) Parents Elizabeth Hamilton, 1st Baroness Hamilton of Hameldon John Campbell, 5th Duke of Argyll Children Siblings Elizabeth Hamilton, Countess of Derby John Campbell, 7th Duke of Argyll James Hamilton, 7th Duke of Hamilton Douglas Hamilton, 8th Duke of Hamilton Augusta Campbell Charlotte Bury George Campbell, 6th Duke of Argyll