1.1 Ivan I (circa 1304–41), grand duke of Muscovy 1328–40. He strengthened and enlarged the duchy, making Moscow the ecclesiastical capital in 1326.
1.2 Ivan II (1326–59), grand duke of Muscovy 1353–59; known as Ivan the Red.
1.3 Ivan III (1440–1505), grand duke of Muscovy 1462–1505; known as Ivan the Great. He consolidated and enlarged his territory, defending it against a Tartar invasion in 1480.
1.4 Ivan IV (1530–84), grand duke of Muscovy 1533–47 and first tsar of Russia 1547–84; known as Ivan the Terrible. In 1581, Ivan killed his eldest son, Ivan, in a fit of rage; the succession passed to his mentally handicapped second son, Fyodor.
1.5 Ivan V (1666–96), nominal tsar of Russia 1682–96.
1.6 Ivan VI (1740–64), infant tsar of Russia 1740–41.