Cavaliers

Cavaliers was a nickname for the people who fought for King Charles I of England during the English Civil War. They fought against the Roundheads and Parliament. At first the name applied only to the royalist cavalry; the words are similar because they were originally the same word.

Etymology

The word Cavalier comes from the Latin word which means 'horseman'.

Lord John Stuart and his Brother, Lord Bernard Stuart, c. 1638, by Sir Anthony van Dyck. Both Lord John Stewart and Lord Bernard Stewart died in the English Civil War, fighting on the Royalist side.
Triple Unite gold coin of 1644: the Latin legend translates as "The Protestant religion, the laws of England, the liberty of Parliament. Let God arise and His enemies be scattered."
Charles I in Three Positions, the triple portrait of Charles I by Anthony van Dyck

This short article about history can be made longer. You can help Wikipedia by adding to it.