Welcome to the Worldwide Greathead family my One-Name Study - Sources
- [S16] E-mails between Tim Smellie and Jan Cooper from 27 Nov 2003.
- [S140] E-mails between David Olton and Jan Cooper from 7 April 2006.
- [S196] E-mails between Terry desouza and Jan Cooper from 27 August 2007.
- [S320] Emails between Desta Hall and Jan Cooper from 11 February 2011.
- [S2890] Emails between Peter Shattock and Jan Cooper from 14 June 2007.
- [S2927] E-mails between Phillip Pare and Jan Cooper from 2 September 2008.
- [S2939] Emails between Caroline M Greathead Wood and Jan Cooper from 12 January 2006.
- [S2977] Emails between David E K Greathead and Jan Cooper from 4 January 2006.
- [S3339] Emails between Tony Greathead and Jan Cooper from 10 April 2001.
- [S4988] Letters between John Greathead and Jan Cooper from 2 March 2003.
- [S9590] Emails between Kathy Nicholson and Jan Cooper from 15 December 1997.
- [S10884] Emails between Andy Cippico and Jan Cooper from 20 December 2004 see also his website www.cippico.com.
- [S10886] Emails between Helen Claire Sherlock née Cippico and Jan Cooper from 28 December 2007.
- [S12294] Emails between Maureen Cremin née Greathead and Jan Cooper from 8 December 20004.
- [S14492] Emails between Wendy Johnson née Berridge and Jan Cooper from 5 March 2015.
- [S16857] Emails between Angelique Greathead and Jan Cooper from 16 April 2006.
- [S18572] Emails between Cathy Goll and Jan Cooper from 9 March 2006.
- [S20859] E-mails between Jevon David Thistlewood and Jan Cooper from 9 February 2023.
- [S24246] Emails between David Randal Tunley and Jan Cooper from 4 August 2009.
- [S25399] Emails between Dennis Frere-Smith and Jan Cooper from 9 August 2010.
- [S29062] E-mails between Lynn Croal and Jan Cooper from 23 October 2012 title.
- [S29603] E-mails between Stephen Cock and Jan Cooper from 13 April 2013 title.
- [S30739] E-mails between Richard Hind and Jan Cooper from 13 January 2014 title.
- [S33107] E-mails between Matthew Frere-Smith and Jan Cooper from 18 July 2025.
- [S40047] US Social Security Death Index.