Synonyms for Frederick II (same or very similar meaning)
WordNet sense 1 (king of Prussia from 1740 to 1786; brought Prussia military prestige by winning the War of the Austrian Succession and the Seven Years' War (1712-1786)):
Frederick the GreatWordNet sense 2 (the Holy Roman Emperor who led the Sixth Crusade and crowned himself king of Jerusalem (1194-1250)):
Holy Roman Emperor Frederick IIFrom the ODE community, based on WordNetadd/edit