Rather than start a whole new thread.
I heard a statement in a program on Celts this weekend that because of the social structure of conqueror and conquered, only 10 loan words have passed from Welsh into the English language. Any one got any ideas on what they might be, or where to find out? I guessed "Bard" but that comes from Gaelic apparently. If you think Eisteddford is in English use then that might be one. I have not yet had time to research this yet. (Druid?)
Rod