hello, Fireflyer -- I think I might have responded to your query awhile back on another board, but I'm not sure... I just came across your message here on the Watkin family forum.I am related to your Gwatkins also, being a descendant of Matthew Gwatkin (1759-1829) of Bryngwyn and Llantilio Pertholey, who was the father of the Thomas and Matthew Gwatkin (b. 1788) that you mention.
Sarah Gwatkin was the wife of Thomas, and Sophia Gwatkin, Edward, and Thomas Gwatkin (b. 1842) were their children.
There is a website called treesandstars.com devoted to a One-Name Study of the Gwatkins.