Ivan V of Russia

Born in 1666, Ivan Alekseyevich was the youngest son of Tsar Alexis I by his first wife, Maria Miloslavskaya. His half-brother Peter came from their father's second marriage to Natalya Naryshkina. When the brothers ascended together in 1682, Ivan carried the older claim but none of the capacity: his challenges were serious enough that the reign became Peter's in all but name. For fourteen years the arrangement held, one tsar nominal and one tsar actual, until Ivan's death in 1696 left Peter to rule alone.