John Fremantle, 5th Baron Cottesloe

Commander John Tapling Fremantle, 5th Baron Cottesloe, 5th Baron Fremantle, DL JP RN (born 22 January 1927) is a Baron in the Peerage of the United Kingdom and an Austrian nobleman.

The son of John Walgrave Halford Fremantle, 4th Baron Cottesloe (1900–1994), he was educated at Summer Fields School and Eton College.

He followed the family tradition set by his ancestor Admiral Thomas Fremantle and joined the Royal Navy in 1945. He commanded H.M.S. Palliser between 1959 and 1961, retiring from the Navy in 1966 with the rank of Commander. He was High Sheriff of Buckinghamshire in 1969.

He inherited on the death of his father in 1994 the British peerage title Baron Cottesloe. He also inherited the Austrian noble title "Baron Fremantle", which is an authorized title in the United Kingdom by Warrant of 27 April 1932. He was Lord-Lieutenant of Buckinghamshire between 1984 and 1997.

A Justice of the Peace for Buckinghamshire since 1984, he resides at Swanbourne, where he is commonly referred to as 'The Commander'.

Marriage and children
He married Elizabeth Ann Barker, daughter of Lt.-Colonel Henry Shelly Barker, on 26 April 1958. They had two daughters and one son:


 * Hon. Elizabeth Wynne Fremantle (b. 15 February 1959)
 * Hon. Frances Ann Fremantle (b. 7 June 1961)
 * Hon. Thomas Henry Fremantle (b. 17 March 1966)

He is the father-in-law of Iain Duncan Smith, who is married to his daughter, Elizabeth "Betsy" Fremantle, and they have four children, who are being raised in their father's Roman Catholic faith.