I have another friend who was recently knighted by HRH Dom Duarte, de jure King of Portugal. as a Knight of the Order of Merit of the Portugal Royal House. He is not 'Sir N'. He is a Cavaleiro da Ordem do Mérito da Casa Real Portuguesa.
- Only citizens of the British Commonwealth use the courtesy titles Sir and Dame. The British knighthoods granted to citizens of other countries are honorary. Honorary knights do not use the titles Sir or Dame.
- Knights in countries other than Britain rarely have any kind of prefix that shows they are knights.
However, Charles is a knight, and I wish to acknowledge that. Were he German, I would refer to him as 'Ritter', if he were Italian, it would be 'Cavaliere', but since he is of proud French descent, I choose to use the French term for knight, 'Chevalier'.