Welcome to the Worldwide Greathead family my One-Name Study - Sources
- [S16] E-mails between Tim Smellie and Jan Cooper from 27 Nov 2003.
- [S88] E-mails between Tony Cairns and Jan Cooper from 8 December 2004.
- [S140] E-mails between David Olton and Jan Cooper from 7 April 2006.
- [S187] E-mails between Kim Murray and Jan Cooper from 25 March 2007.
- [S196] E-mails between Terry desouza and Jan Cooper from 27 August 2007.
- [S327] E-mails between Denise Smith and Jan Cooper from 20 January 2007.
- [S406] E-mails between Michael Taylor and Jan Cooper from 3 May 2015.
- [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.
- [S4843] Emails between Marjorie Greathead née Rogers and Jan Cooper from 6 March 2003.
- [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.
- [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.
- [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.
- [S40006] Wairarpa deaths - www.angelfire.com/az/nzgenweb/deathsw.html.
- [S40047] US Social Security Death Index.