- [S102] 1851 Census Returns of England and Wales, Home Office, (30 March 1851;), HO 107/2334 f.527 pp.6-7 (Reliability: 3).
Hamlet of Pilley, Tankersley
William Kay, Head, Mar, 37, Iron Miner, Yorkshire Pilley in Tankersley
Hannah Kay, Wife, Mar, 50, Yorkshire Hoyland Swain
Emma Parratt, Daur in Law, U, 24, Miner's Daur, Yorkshire Birdwell in Worsbro'
Jonathan Kay, Son, U, 15, Hurrier in Iron Mine, Yorkshire Pilley in Tankersley
Jabez Kay, Son, 13, Hurrier in Iron Mine, Yorkshire Pilley in Tankersley
David Kay, Son, 11, Scholar, Yorkshire Pilley in Tankersley
Wilfred Kay, Son, 7, Scholar, Yorkshire Pilley in Tankersley
Elizabeth Parratt, Grand Daur, 11m, Yorkshire Pilley in Parish of Tankersley
- [S195] International Genealogical Index, The Church of Jesus Christ of Latter-Day Saints, (www.familysearch.org;), baptism of Jonathan Kay, son of William Kay and Hannah, 21 Jun 1835, Tankersley, Yorkshire (extracted from registers) (Reliability: 2).
- [S103] 1861 Census Returns of England and Wales, General Register Office, (7 April 1861;), RG 9., RG 9/3451 f.115 p.13 (Reliability: 3).
Hoyland Comn, Private House, Hoyland Nether
Jonathan Kay, Head, Mar, 25, Plate Layer, Yorkshire Pilley
Hannah Kay, Wife, Mar, 24, Yorkshire Birdwell
William Kay, Son, 3, Yorkshire Hoyland
Eliza A Kay, Daur, 2, Yorkshire Hoyland
Emma Kay, Daur, 5 mo, Yorkshire Hoyland
- [S205] FreeBMD, (www.freebmd.org.uk;), death registration of Jonathan Kay, 37, Barnsley 9c 122, March quarter 1872 (Reliability: 2).