John Howlett (c.1769- ) was a seaman aboard the Sirius when he arrived at Sydney in January 1788 as part of the First Fleet. He returned to England on the Waaksamheid in 1791.
* information from Mollie Gillen, The Founders of Australia: A Biographical Dictionary of the First Fleet (1989), p 180
'Howlett, John (c. 1769–?)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/howlett-john-31316/text38710, accessed 2 June 2025.