Jacob Pleydell-Bouverie, 4th Earl of Radnor

Jacob Pleydell-Bouverie, 4th Earl of Radnor (18 September 1815 – 11 March 1889), was the son of William Pleydell-Bouverie, 3rd Earl of Radnor and Judith Anne St John-Mildmay. He was styled Viscount Folkestone from 1828 until 1869.

He married Lady Mary Augusta Frederica Grimston, daughter of James Walter Grimston, 1st Earl of Verulam, on 3 October 1840. They had twelve children:

William Pleydell-Bouverie, 5th Earl of Radnor (19 June 1841 – 3 June 1900)
Hon. Duncombe Pleydell-Bouverie (10 October 1842 – 25 January 1909)
Rev. Hon. Bertrand Pleydell-Bouverie (23 April 1845 – 7 November 1926), married Lady Caroline Nelson, daughter of Horatio Nelson, 3rd Earl Nelson
Lt.-Col. Hon. John Pleydell-Bouverie (18 July 1846 – 28 March 1925), married Grace Malaby and had issue
Lady Anne Pleydell-Bouverie (c.1847 – 18 September 1915), married Archibald Alexander Speirs
Hon. Mark Pleydell-Bouverie (27 September 1851 – 17 February 1895)
Hon. Kenelm Pleydell-Bouverie (29 March 1852 – 11 July 1921), married Evelyn Maitland-Makgill-Crichton and had issue
Lady Margaret Pleydell-Bouverie (c.1853 – 5 January 1924), married David Maitland-Makgill-Crichton and had issue
Lady Edith Pleydell-Bouverie (c.1855 – 28 December 1922), married Charles Cotes
Hon. Christopher Pleydell-Bouverie (30 December 1856 – 22 March 1892)
Hon. Frank Pleydell-Bouverie (19 April 1858 – 15 July 1909)
Lady Gertrude Pleydell-Bouverie (19 April 1858 – 11 January 1940), married Arthur Monckton and had issue

Honorary titles
Preceded by The Marquess of Ailesbury	Lord Lieutenant of Wiltshire 1878–1889	Succeeded by The Marquess of Bath
Peerage of Great Britain
Preceded by William Pleydell-Bouverie	Earl of Radnor 1869–1889	Succeeded by William Pleydell-Bouverie