Some of my favorite Welsh hymn tunes: "Bryn Calfaria", and "Aberystwyth". A web site with some info about Welsh music: The harp and dragon: http://ww1.harpanddragon.com/webpages/harpdrag
A web site with some info about Welsh music: The harp and dragon: http://ww1.harpanddragon.com/webpages/harpdrag