Joseph Velyaminov-Rutski (father Feliks Velyaminov from
Moscow and mother Bahumila Korsak) lived in
Polish–Lithuanian Commonwealth, had Ruthenian origins and was noble and
Calvinist. Joseph's father Feliks Velyaminov belonged to the
Rurik dynasty; he escaped
Russian Tsardom during the reign of
Ivan the Terrible. Ivan Velyaminov was born in 1574 and, according to a use of noble families, was named after the estate where he was born, Ruta, thus he was named Ivan Velaminov-Rutski. At 17 he moved to Prague where he studied under the
Jesuits and converted to the Catholic Church of Latin Rite against the will of his parents. From 1593-1596, Rutski studied philosophy at
Wurtzburg. After the death of his father, his mother, who remained a Calvinist, opposed Rutski's desire to enter into religious life and stopped supporting his studies. Rutski continued his studies in the
St. Athanasius Greek College in Rome, where he was authorized by
Pope Clement VIII to change from the
Latin Rite to the
Byzantine Rite. Rutski completed his studies in 1603. ==Metropolitan of Kiev==