John Gannon was a marine when he arrived at Sydney aboard the Scarborough in January 1788 as part of the First Fleet. He died at Port Jackson on 20 June 1788.
* information from Mollie Gillen, The Founders of Australia: A Biographical Dictionary of the First Fleet (1989), p 139
'Gannon, John (?–1788)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/gannon-john-31160/text38548, accessed 11 May 2025.