Steklov was born in Nizhny Novgorod, Russia.
He died in Gaspra[?], Crimea, USSR, (now Ukraine).
See also:
... WW2 Gestapo Sicherheitsdienst (SD; Defunct) West Germany Bundesamt fur Verfassungsschutz[?] (BfV, Defunct) Bundesnacrichtendienst[?] (BND) East Germany State ...