The wife of a Sir is indeed called Lady.
This title is a courtesy title, meaning it is given as a mark of respect and not an official title.
Here's how it works:
- Sir is a title given to men who have been knighted by the monarch.
- Lady is a courtesy title given to the wife of a Sir.
Examples:
- If a man is knighted as Sir John Smith, his wife would be called Lady Smith.
- The title Lady is not used by the wife of a Baronet, who holds the hereditary title Sir.
Note: The title Lady can also be used for women who are peeresses in their own right, such as a Countess or Baroness. However, this is a separate usage and not related to the wife of a Sir.