Ivan

Russian, Bulgarian, Ukrainian, Belarusian, Serbian, Croatian, Czech, Slovak, Macedonian, Slovene, English, Italian

Newer form of the old Slavic name Іѡаннъ (Ioannu), 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.