In the 1881 British Cencus, there was a family of KELVERT(note the spelling), living at Kings Cottage, Powick, Worcestershire, UK. The head was:-
George Kilvert, b.1842, at Upton Magna, Shropshire - Gardener. Eliza Kilvert, b.1840, at Oldbury, Staffordshire. - wife. Albert G Kilvert b.1868, at Tibberton, Shropshire. - son. Arthur R.W.Kilvert,b.1870, at Morton, Staffordshire. - son. Harry C Kilvert,b.1872, at Morton, Staffordshire. - son. Florence L Kilvert, b.1875, at Morton, Staffordshire. - dau.