Looking for These Surnames David Davis Davies Davy from England New Zealand Australia

I have now set up a web site because that gives all the answers most people seem to ask. URL= http:www.davisfamilytree.org . Recently I have made two new contacts & one comes from the South Island of New Zealand where one person said that there family surname was Davis before changing to Davies. So we now have a chances that the Grandfather we are looing for may well be called George Charles Davies from the south Island of New Zealand.