Yes I did get your message thanks, just forgot my account details.
In regard to my family line of Welton all I know is the last 2 generations which includes my grandmother and great grandfather. My grandmother is still alive and uses her married name instead of Welton. My great grandfather John Henry Welton lived and worked in Hessle, East Yorkshire and we think originally he came from Hull though we have no records to see if this is true. There are still some people with the surname Welton in Hessle who are distant relations whom we don't know.
I'm not sure if this information is any use as your "Weltons" were a few centuries before mine, though the name must have come from somewhere!