Hi Barbara,
Thanks for those Websites, although I always find it difficult finding what you require via the National Archives and a bit hard to navigate around there Website, (I'm a bit thick) but lets have a go!!....Hope you do not mind me asking, because I don't understand the true meaning of British Subject,could it mean Charles Johnson was born in Sweden and he retained his surname (Johnson) because his Father was working/Living in Sweden at that time, or, on the other hand, like your Grandfather there names changed from Jonsson to Johnson when they came to England....And lastly, we are not related, are we?........Thanks Again Barbara and you have given me lots to go on.
Derek