Welsh Research
Please check the Brittish Research section also since lots of those links are for all of the UK.
The National Library of Wales
Historical Directories, England and Wales, 1750 - 1919
http://www.historicaldirectories.org/hd/
The Welsh Settlement in PA
http://www.angelfire.com/ut/humceltic/webdoc1.html
The Welsh in Pennsylvania
The Welsh Founders of Pennsylvania
Welsh Naming
Welsh Naming 2
Welsh Naming 3
Welsh Naming 4
This section updated on July 22, 2011