Baptised on 1 November 1795 in the church of St Laurence in Catsfield, he was the younger son of William Markwick, who later changed his name to Eversfield, and his wife Mary.
[2] On 15 June 1815 in the church of St James, Piccadilly he married Mary Crew (1795–1872), daughter of Robert Hawgood Crew, Secretary to the Board of Ordnance, and his wife Mary Sophia Foreman, daughter of John Foreman.
[3] In 1818 his elder brother died, making him heir to the family's extensive landholdings,[4] which included the manor and mansion of Catsfield as well as lands in Pevensey, Ninfield, Mountfield, Battle and Bexhill.
Following the death of his mother in 1823, he sold the Catsfield property and moved to Denne Park outside Horsham.
[5] He and Mary had three children:[6] His widow Mary in 1827 married Henry Tredcroft (1788-1844), becoming the mother of Edward Tredcroft, and, widowed a second time, in 1847 married the Reverend John James Vaughan (1809-1881), son of Sir John Vaughan.