Background
Thynne was the third and youngest son of John Thynne, 4th Marquess of Bath, and his wife Frances Isabella Catherine (née Vesey).
Member of Parliament in the United Kingdom
Thynne was the third and youngest son of John Thynne, 4th Marquess of Bath, and his wife Frances Isabella Catherine (née Vesey).
He was commissioned a Second lieutenant in the Royal Wiltshire Yeomanry in April 1897. Following the outbreak of the Second Boer War in late 1899, Thynne volunteered for service and was commissioned a Lieutenant in the Imperial Yeomanry on 7 February 1900, serving in South Africa with the 1st (Wiltshire) company of the 1st Battalion. He was promoted lieutenant in the Royal Wiltshire Yeomanry on 13 June 1900, while still in South Africa.
He was later a temporary Lieutenant-Colonel in the Service Battalion of the Wiltshire Regiment and served in the Somaliland campaign of 1903 to 1904.
In the January 1910 general election he was elected to the House of Commons as one of two representatives for Bath. He was killed in action in France on 14 September 1918, aged 45, and was buried at Béthune Town Cemetery.
30th United Kingdom Parliament.