Shivtzov (Russian: Шивцовы) was the name of noble family of Orenburg Cossacks origin. Ivan Ilijich Shivtzov was a Ataman of stanitsa Vozdvízhenskaya and a member of an Orenburg Cossack rada in time of ataman Alexander Dutov revolt against the Soviet authorities in Orenburg Host in 1918.
References
Shivtzov family (Orenburg) Wikipedia(Text) CC BY-SA