Francis II
— Noun
– English
～ the last Holy Roman Emperor (1768-1835)
Frederick II
— Noun
– English
～ the Holy Roman Emperor who led the Sixth Crusade and crowned himself king of Jerusalem (1194-1250)
factor III
— Noun
– English
～ an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
Ferdinand III
— Noun
– English
～ Holy Roman Emperor and king of Hungary and Bohemia who signed the Peace of Westphalia ending the Thirty Years' War (1608-1657)