tywysog
The Prince of Wales's Feathers.
welsh regement
Yes, it comes from the meaning Welsh prince.
The Prince of Wales is Charles Windsor, the son of the current Queen of England. William and Harry are next in line.
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This is an interesting question. I don't think there were any full blood Welsh born prince of Wales because Wales was never fully united unless it was under someone who revolted against the English or tried to conquer all of Wales. But the current Queen of England is part Welsh. She is descended from a Welsh ruler named Rhys ap Gruffudd as were all the English rulers since the Tudors. If you look at it that way, the last Welsh born Prince of Wales is her son, Charles.
Wales never joined England. Wales is a pricipality and member of the United Kingdom. The last Welsh King was Owain Gwynedd (1170), the last Prince of Wales (whom was Welsh - duh!) was Madog ap Llywellyn (i think was 1409). I think the last living Prince of Wales who was Welsh (not English), was Prince Einion. The Principality was actually founded around 1206.
Prince Charles spent a term at the University College of Wales in Aberstwyth.
Madoc is a mythical prince. Madoc was supposedly a Welsh prince who sailed to America in the year 1170. The story states that he was the son of Owain Gwyedd.
Queens English, Welsh, German and possibly some Arabic.
Owain Glyndwr. The last true Prince of Wales.
Prince Charles was invested at Caernarfon Castle.