Say two lord, or lord and a lady are talking. Would they start a conversation with a person whose name they don't know? And if so, how would they ask for the other's name/introduce themselves? I'm specifically curious about French nobles in the 10th/11th century.
Edit: eg. Charles Brandon, Duke of Suffolk. Would he say "I'm Charles Brandon." "I'm Brandon." "I'm the Duke of Suffolk." or just "I'm Suffolk." or something else?