Which Royal House reigned over England before the House of Windsor?

Everyone knows that the house of Windsor and the house of Saxe-Coburg and Gotha are the same thing! George V changed the name in 1917 because of anti-German sentiment. If that hadn't happened, they would still be known by the old name. And the Mountbattens (that's Philip's line in case you didn't know) were originally Schleswig-Holstein-Sonderberg-Glucksburg… Now you know.