For the vast majority of noble ranks, the correct term is My Lord or Lady, or Your Lordship or Your Ladyship. This means that the correct form of address for noblemen such as Marquis, Earl, Count, Viscount, and Baron would be My Lord or Your Lordship (or their specific title name).

Here are a few general guidelines to follow when addressing people with noble titles: Use proper titles: When addressing someone with a noble title, it is important to use their proper title when speaking to or about them. For example, you would refer to a Duke as “His Grace,” an earl as “Lord,” a viscount as “Viscount,” and a Baron as “Lord.”

Sir is used to address a man who has the rank of baronet or knight; the higher nobles are referred to as Lord.

Sir is the honorific greeting in English. Officially, this greeting is addressed to a man who bears a certain noble title (knight or baronet). In daily activities, this greeting can also be used to show respect for the person being greeted, such as a male teacher. Sir can also be used to address a man whose name is unknown.