IvanmRussian, Bulgarian, Ukrainian, Belarusian, Serbian, Macedonian, Croatian, Czech, Slovak, Slovene, English, Italian, Portuguese, Romanian, Danish, Swedish, Norwegian, Estonian Newer form of the Old Church Slavic name Іѡаннъ (Ioannŭ), which was derived from Greek Ioannes (see John). This was the name of six Russian rulers, including the 15th-century Ivan III the Great and 16th-century Ivan IV the Terrible, the first tsar of Russia. It was also borne by nine emperors of Bulgaria. Other notable bearers include the Russian author Ivan Turgenev (1818-1883), who wrote Fathers and Sons, and the Russian physiologist Ivan Pavlov (1849-1936), who is best known for his discovery of the conditioned reflex.
RudolfmGerman, Czech, Slovak, Hungarian, Dutch, Russian, Armenian From the Germanic name Hrodulf, which was derived from the elements hruod meaning "fame" and wolf meaning "wolf". It was borne by three kings of Burgundy and a king of West Francia, as well as several Habsburg rulers of the Holy Roman Empire and Austria. Anthony Hope used this name for the hero in his popular novel The Prisoner of Zenda (1894).