On 30 September 1845, Clifford was married to Hon. Agnes Catherine Louisa Petre (1826–1891) at Thorndon Hall, the Petre family estate in Essex. Agnes was a daughter of William Petre, 11th Baron Petre and Emma Agnes Howard.[9] Together, they were the parents of:
Hon. Bertha Mary Agnes Clifford (b. 1848), who married Brodie Manuel de Zulueta, 3rd Count of Torre Díaz,[10] son of Pedro José de Zulueta, 2nd Count of Torre Díaz, in 1892.[2]
Hon. Mary Lucy Constance Clifford (b. 1849), who became a nun.[11]
Lewis Henry Hugh Clifford, 9th Baron Clifford of Chudleigh (1851–1916),[5] who served as aide-de-camp to King Edward VII in 1901; he married Mabel Anne Towneley, daughter of Lt.-Col. John Towneley, MP for Beverley, in 1890.[2]
Bede William Hugh Clifford (1852–1853), who died in infancy.[2]
Edith Teresa Mary Clifford (b. 1855), who became a nun.[11]
Hon. Edmund Charles Hugh Clifford (1857–1867), who died young.[2]
William Hugh Clifford, 10th Baron Clifford of Chudleigh (1858–1943),[12] who married Catherine Mary Bassett, daughter of R. Bassett, in 1886. After her death, he married May Knox, a daughter of Sir Adrian Knox, Chief Justice of the High Court of Australia. After her death, he married his former housekeeper, Grace Muriel St. Clair-Munro, a daughter of W. St. Clair-Munro, in 1943.[13]
Hon. Walter Charles Ignatius Clifford (1862–1956), who died unmarried.[2]
Hon. Emma Mary Agnes Clifford (b. 1862), who married Francis Egerton Harding, son of Egerton William Harding, in 1889.[2]
Lord Clifford died on 5 August 1880 at Ugbrooke Park.[8] After a funeral service conducted by the Roman Catholic Bishops of Plymouth and Clifton (his younger brother William), he was buried in the family vault of the private chapel at Ugbrooke.[14] Upon his death, he was succeeded in the barony by his eldest son, Lewis. When Lewis died in 1916,[5] he was succeeded by another of the 8th Baron's sons, William.[12] His widow died in 1891 at 69 Onslow Gardens in the Royal Borough of Kensington.[2]
^ abG.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester: Alan Sutton Publishing, 2000), volume III, page 306.