Epiphanius Slavinetsky

Epifany Slavinetsky (Russian: Епифа́ний Славине́цкий) (died November 19, 1675) was an ecclesiastical expert of the Russian Orthodox Church who helped Patriarch Nikon to revise ancient service-books. His actions precipitated the raskol, the great schism of the national church.

Epifany was born in Moscow. In the 1620s, he attended the Kiev Brotherhood School and furthered his education abroad. He was one of the most educated people of his period in Central and Eastern Europe. He came to master Latin, Polish, Ancient Greek and Hebrew. On his return to Kiev, he took monastic vows in the Kiev Pechersk Lavra. In the late 1630s, he compiled the first Latin-Church Slavonic lexicon, which he would revise on several occasions.

Upon hearing about Epifany's scholarly expertise, the Imperial Russian Tsar Alexis invited him to correct the ecclesiastical books of Muscovy. Epifany arrived in Moscow in 1649 and visited the Trinity-Sergius monastery the same year. He quickly managed to secure the patronage of the Boyar Boris Morozov and Metropolitan Nikon of Novgorod, who was elected Patriarch a short time later.

...
Wikipedia