Thynne, John Alexander, 4th Marquess of Bath (1831 -1896)
John Alexander Thynne, 4th Marquess, was the eldest son of Henry Frederick, 3rd Marquess, and Harriet Baring, daughter of Alexander, 1st Baron Ashburton. He succeeded his father in 1837, at the age of six. He was educated at Eton College, and Christ Church, Oxford, where he matriculated 31 May 1849. He was a Major in the Royal Wiltshire (Princess of Wales Own) Yeomanry Cavalry, Lord Lieutenant and Custos Rotulorum of Wiltshire, Honorary Colonel of the Wiltshire Yeomanry Cavalry, and Chairman of Wiltshire County Council. He married, 20 August 1861, Francis Isabella Catherine Vesey, eldest daughter of 3rd Viscount de Vesci. In May 1858, he went to Lisbon as Ambassador, and later served as Ambassador at Vienna. In 1880 he published Observations on Bulgarian affairs as a result of a tour undertaken in Bulgaria.