10. William III of Orange
Born into his role as the Prince of Orange in 1650, William III ruled from 1689 until he died in 1702.
William married his cousin, Mary.
You may have heard him referred to as King Billy throughout Northern Ireland and Scotland. He was a Protestant king who fought wars against France’s Catholic king, Louis XIV.
In 1685, William invaded England to run out his father-in-law. This sparked the so-called Glorious Revolution, and William and Mary ruled jointly.