8. Godfrey of Bouillon
Godfrey of Bouillon was not actually a ruler, but a knight, yet he cannot be excluded from this list due to his role in the annihilation of thousands of Jews during The Crusades.
Godfrey of Bouillon was not actually a ruler, but a knight, yet he cannot be excluded from this list due to his role in the annihilation of thousands of Jews during The Crusades.
