On September 6, 1666, Tsar Ivan V, son of Alexei Mikhailovich and brother of Princess Sophia and Peter I. was born. Personal business John Alekseevich (1666 - 1696) was the son of Tsar Alexei Mikhailovich and his first wife Maria Ilyinichna Miloslavskaya. From early childhood, he was very poor in health, he had scurvy, a serious eye disease, which greatly weakened his vision, and, possibly, epilepsy. He also stuttered and had a reputation for the demented.