Daniel James "Gwyrosydd" 1840 – 1920
Wrote the words “Calon Lan” he was originally from Treboeth, Swansea where he worked at the steelworks and at the tinplate works and then as a gravedigger in Mountain Ash. It is said that he wrote the words to his poem when is grandson came home and asked him to help with his homework the boys task was to write a verse on the Pure Heart “Calon Lan”. His friend John Hughes “Glandwr” composed the music within a few hours.