Horatio Nelson, 1st Viscount Nelson | Viscount | Weymouth | Vickers Viscount | Weymouth, Dorset | Bernard Montgomery, 1st Viscount Montgomery of Alamein | William Howe, 5th Viscount Howe | viscount | Garnet Wolseley, 1st Viscount Wolseley | Charles Lyttelton, 10th Viscount Cobham | William Slim, 1st Viscount Slim | Edmund Allenby, 1st Viscount Allenby | William Lamb, 2nd Viscount Melbourne | Julian Byng, 1st Viscount Byng of Vimy | Alan Brooke, 1st Viscount Alanbrooke | William Waldorf Astor, 1st Viscount Astor | James Bryce, 1st Viscount Bryce | Henry St John, 1st Viscount Bolingbroke | Henry John Temple, 3rd Viscount Palmerston | Edward Grey, 1st Viscount Grey of Fallodon | Charles Bathurst, 1st Viscount Bledisloe | Walter Runciman, 1st Viscount Runciman of Doxford | Viscount Falkland | Tina Weymouth | Samuel Hood, 1st Viscount Hood | John Anderson, 1st Viscount Waverley | James Craig, 1st Viscount Craigavon | William Beresford, 1st Viscount Beresford | William Barrington, 2nd Viscount Barrington | Weymouth, Massachusetts |
On 28 July 1714, upon the death of his great uncle Thomas Thynne, 1st Viscount Weymouth, though he was only four years old, he inherited Longleat House and its great estates and succeeded to the Baronetcy of Thynne, of Kempsford, Gloucestershire, and (by special remainder) to the titles of Baron Thynne of Warminster, Wiltshire, and Viscount Weymouth, of Dorset.
The Marquess holds the subsidiary titles Baron Thynne, of Warminster in the County of Wilts, and Viscount Weymouth, in the County of Dorset, created in 1682 in the Peerage of England.
Known by the courtesy title Viscount Weymouth from birth, he was born at The Stable Yard, St James's, London, the eldest son of John Thynne, 4th Marquess of Bath, by the Honourable Frances Isabella Catherine Vesey, daughter of Thomas Vesey, 3rd Viscount de Vesci.