Jacob Chornoryzets
Jacob the Monk (; ) was an 11th-century monk and author in Kievan Rus'. He is known for an ode to Vladimir the Great in honor of his conversion of Kievan Rus to Christianity in 988, as well as a work on Boris and Gleb. References

Monks from Kievan Rus'
11th-century people from Kievan Rus'
Writers from Kievan Rus'