« Reply #29 on: Thursday 25 June 20 12:02 BST (UK) »
To give a little update to my research, I have been looking through the British Colonial Slave registers but they are 1813-34 , which is too late for our John Potter. However, there were several slaves called John Potter in Jamaica during that time period.
I couldn't find any record of a John Potter in the records for Alien Arrivals to Liverpool between 1790 and 1807.
Also, someone has posted an image of Louisa Potter (daughter of John Potter) on Ancestry.com . Its hard to tell much from the picture as it is not in colour but Louisa was clearly not what we would call "half-caste", meaning John Potter was not a full-blooded Sub Saharan African.
A few months ago I was in contact with a female direct descendant of John Potter and she has said her brother is going to get a DNA test which will tell us what YDNA haplogroup John Potter belonged to, which will be very informative.
North West, North Wales and Isle of Man:
Ward, Campbell, Cowin, Cowell, Parry, Fryer, Davies, Hughes, Briscoe, Jones, Spencer, Brownbill, Crowfoot, Nield, Randles, Youde
Gozo, Malta:
Apap / De Apapis, Camilleri, Grech, Muscat, Micallef, Custo, De Nasi
Angus, Scotland:
Ormond, Salmond, Cook, MacDonald