Welcome to the Worldwide Greathead family my One-Name Study - Sources
- [S415] E-mails between Tim Hewitt and Jan Cooper from 21 January 2009.
- [S416] E-mails between David Boardman and Jan Cooper from 11 November 2014.
- [S504] E-mails between Steve Wright and Jan Cooper from 16 June 2016 www.stevewright.nz.
- [S18281] E-mails between Arron Greathead and Jan Cooper from 5 December 2022.
- [S28296] E-mails between Liz Williamson and Jan Cooper from 11 SEptember 2020.
- [S29092] E-mails between Lisa Royles née Greathead and Jan Cooper from 12 September 2018.
- [S33154] Emails between John Ingram Strickland and Jan Cooper from 6 August 2018.
- [S33190] E-mails between Neil Strickland and Jan Cooper from 30 December 2022.
- [S33401] E-mails between Craig Clarke and Jan Cooper from 6 December 2018.
- [S33568] E-mails between Serena Romano and Jan Cooper from 6 July 2019.
- [S33675] E-mails between Peter Lowe and Jan Cooper from 30 December 2019.
- [S33829] E-mails between Clare Perkins née Whayman and Jan Cooper from 5 April 2020.
- [S33962] E-mails between Steve Tunley and Jan Cooper from 20 November 2020.
- [S34048] E-mails between David Rooke and Jan Cooper from 11 March 2021.