5. House of Orange-Nassau
Counts of Nassau and their descendants have played important roles in European history since the 23th century. Orange-Nassau family have had a deciding influence on creating Northern Europe we know today. Their scions have held various titles in Germany, Netherlands, and France and even rose to the English throne. Wiiliam II, Prince of Orange, married Marry II and became William III, King of England, Scotland and Ireland in 1689. The royal couple didn’t have any children, which is probably for the best, since they were first cousins. Today, King Willem-Alexander is the King of Netherlands, while Luxemburg is ruled by his relative of Nassau-Weilburg branch, Grand Duke Henri. They are both heads of their respective family branches.
