Thomas Henry Thynne, 5th Marquess of Bath KG CB PC JP (15 July 1862 – 9 June 1946), styled Viscount Weymouth until 1896, was a British landowner and Conservative politician.Known from birth by the courtesy title of Viscount Weymouth, he was born at the Stable Yard, St James's, Westminster, the eldest son of John Thynne, 4th Marquess of Bath, by the Honourable Frances Isabella Catherine Vesey, a daughter of Thomas Vesey, 3rd Viscount de Vesci.He was appointed Lord Lieutenant of Somerset in 1904 and Chairman of Wiltshire County Council in 1906, and held both posts simultaneously until his death in 1946.[8] Lord Bath was also a Lieutenant-Colonel in the Royal Wiltshire Yeomanry and an Honorary Colonel of that regiment and of the 4th Battalion of the Somerset Light Infantry.At the time of Violet's birth her mother had been the wife of Sir Charles Mordaunt, 10th Baronet, but she was said to be the illegitimate daughter of Viscount Cole, who was later co-respondent in a divorce action.
Garter-encircled shield of arms of Thomas Thynne, 5th Marquess of Bath, KG, as displayed on his Order of the Garter stall plate in St. George's Chapel.