Names Links
There's a lot of misinformation out there. Here's some decent (or half decent, but entertaining) sites.
Behind the Name: http://www.behindthename.com
Name Nerds: http://www.namenerds.com/
Edgar's Name Page: http://www.geocities.com/edgarbook/names/welcome.html
Saint Names: http://www.catholic.org/saints/stindex.php
Nymbler: http://nymbler.com/
Welsh Names: http://www.c-myste.com/names.html
Welsh Names at Welshpedia: http://www.welshpedia.co.uk/wiki/wales/index.php?title=Male_Welsh_Names
...and much more.