Joseph Downey, a seaman on the Lady Penrhyn, which landed in Sydney in January 1788 as part of the First Fleet, had a child, Joseph, with convict Sarah Bellamy. Joseph jnr was born shortly before the fleet landed and died in late February 1788.
It is not known what happened to Joseph Downey snr.
* information from Mollie Gillen, The Founders of Australia: A Biographical Dictionary of the First Fleet (1989), p 108
'Downey, Joseph (?–?)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/downey-joseph-24920/text33470, accessed 15 March 2025.