First name was "Tiomkin", which is not a Russian given name (it is a surname). The Bolshoi tenor who sang Ovlur in the Bolshoi Prince Igor of 8 November 1958 is printed in the Aquarius AQVR 378-2 booklet as "Овлур .... ТИХОН ЧЕРНЯКОВ" / "Ovlur .... TIKHON TCHERNIAKOV"; that booklet is in the rip folder as Scans.pdf. Same Bolshoi company as this record other appearance (Mazeppa 1952, Nebolsin).