KINGS AND QUEENS

Here in the USA, we are not very familiar with Great Britain and the workings of a monarchy.  In my inimitable style, I'll make this form of government clear as mud for you and my British friends.

The king is the grand pooh-bah of most monarchies unless there isn't one.  The United Kingdom (England, Wales, Scotland, and Northern Ireland) is a type of monarchy.  They have no king.   The current monarch is Queen Elizabeth II.   She became queen in 1952 when her father, King George VI, died without a son or older children.  A first son would have been king if there were one.  Her first son, Charles, will be king if he outlives her.  (Are you wondering why they don't call it a queendom.  The United Queendom would seem more accurate.)

If a king is married his wife is queen.  Queen Elizabeth II is married (1947) and her husband is not king . . . he is Prince Phillip the Duke of Edinburgh.  (Evidently, a King can have a queen but a queen can't have a king.)

The queens children (issue) are known as prince or princess.  Charles, the Prince of Wales, has married Camilla and she has become the Duchess of Cornwall (previously she was known as the slut divorcee he boinked while married to Diana).   She could have been called the Princess of Wales but it didn't sit well with most Brits so she went another way.

The Queen Mum's other children are known as the Duke of York, the Earl of Wessex (his wife is the Countess of Wessex), and Anne the Princess Royal.  The Queen has several cousins which are known as Duke and Duchess or Prince and Princess.  Red headed Sarah divorced her way out of the Royal Family but still holds the title Duchess of York.

Some of these people have different names in different countries.  Sneaky, aren't they.  That's enough.  I'm as confused as you are.
*o*