Try going to a web site:http://www.geocities.com/tp_davis/Davisheraldry2.html
I found three coats of arms on the Davis name.
Scots Heraldic Style
Spanish Heraldic Style
This might be a clue!
I am working on several Davis lines of course, with it being such a common name. My great and great great grandfathers were Steamboat Captains on the Cheseapeake Bay. They were from Va and Md area.
Good Luck! BJ