Feodosy Kosoy
Feodosy Kosoy, "Feodosy the Squint-Eyed" (Феодосий Косой) (fl. 1550s) was a Russian serf-monk in the time of Ivan the Terrible. He preached full equality, rejecting church hierarchy, the Trinity, the sacraments, icons, and churches. His preaching was condemned along with that Matvei Bashkin and the Abbot Artemy in 1553. He fled to the safety of Lithuania and the community of Polish Brethren. References

Russian Christian monks
Russian Christian pacifists
Former Russian Orthodox Christians
Converts to Protestantism from Eastern Orthodoxy
People from the Tsardom of Russia
16th-century farmers