Ivan

Ivan is the Eastern and Southern Slavic form of John, itself derived from the Hebrew name Yohanan, meaning God is gracious. It became one of the most common masculine names throughout Russia and the broader Slavic world, borne by several Russian tsars, most famously Ivan III, who consolidated the Russian state, and the formidable Ivan IV, known as Ivan the Terrible. The name has spread far beyond its Slavic heartland and appears in Spanish and Hungarian as Iván. Related forms and cognates include Johannes, Juan, Jean, Giovanni, Jan, and Johan.