Henry SomersetScudamore, 3rd Duke of Beaufort was born Henry Somerset, the elder son of Henry Somerset, 2nd Duke of Beaufort and his second wife, Rachel Noel. As his fathers eldest son and heir to his fathers title he was known as Marquess of Worcester, a courtesy title. On his fathers death onApril 1714 he succeeded him and became 3rd Duke of Beaufort.
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Source: Wikipedia