Sylvestre Kossoff
From BiblePortal Wikipedia
Sylvestre Kossoff [1]
a Russian divine, who flourished near the middle of the 17th century, was metropolitan of Kief in 1647, and died April 13,1657. Kossoff wrote a work on the Seven Sacraments (Koutimsk, 1653, 4to), which an ecclesiastical council at Moscow in 1690 declared heretical.
