Francis Seymour, 5th Duke of Somerset

Francis Seymour, 5th Duke of Somerset (17 January 1658 – 20 April 1678), known as 3rd Baron Seymour of Trowbridge between 1665 and 1675, was an English peer.

He was the son of Charles Seymour, 2nd Baron Seymour of Trowbridge and Elizabeth Alington (1635–1692). He died aged 20, unmarried and childless, having been shot dead by Horatio Botti (a Genoese gentleman), whose wife Seymour was said to have insulted at Lerici. He was succeeded by his brother Charles Seymour.

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