Jennifer, I've just read your message on this Viohl board, and was interested to see that the other name you listed was Gogel.
My great grandparents were Margaretta Katarina Viohl and Johann Karl Wilhelm (William) Gobel, who came to England from Germany (I believe Prussia) in the 1860s, married in London in 1867 and settled in East London.
Do you think there might be a connection?
Jan in East Sussex, UK