Here is a list of surnames from U – Z at the Small World Family Tree site. You will have to request an invitation or contact the website administrator for access.
For more information visit the website listed below.
If you know who you are looking for the easiest way to find a name you are looking for is to use the CTRL+F and a search box will pop up. Type a name into the box then you can highlight all of the words that match and use the arrows to go up and down.