Sergey Blazhko died in 1956.
Sergey Narovchatov died in 1982.
Sergey Dyozhkin died on January 5, 2000.
Sergey von Freymann died in 1946.
Sergey Sergeyevich Smirnov - geologist - died in 1947.
Sergey Yustinovich Bagotsky died on 1953-03-15.
Sergey Blazhko was born in 1870.
Andrei Blazhko was born on 1978-01-10.
Sergey Lazo died in 1920.
Sergey Merkurov died in 1952.
Sergey Shupletsov died in 1995.
Sergey Zaryanko died in 1871.
Sergey Lunov died in 1978.
Sergey Shubinsky died in 1892.
Sergey Spigelglas died in 1941.
Sergey Belyavsky died in 1953.
Sergey Korzhukov died in 1994.
Sergey Uvarov died in 1855.