John the Russian
John the Russian (Russian: Иоанн Русский; c. 1690 – 9 June [O.S. 27 May] 1730) was a Russian Orthodox slave who is venerated as a saint in the Eastern Orthodox Church. Being a prisoner of war and a slave to a Turkish Ağa, he became famous and respected even by his Muslim master for his humility, steadiness in faith and benevolence.