Klimenty Grigorievich Nagorny (1887 – 28 June 1918 Yekaterinburg), was a Russian Empire sailor.^[1] He was the personal assistant of Alexei Nikolaevich, Tsarevich of Russia.

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Klimenty Grigorievich Nagorny was born in 1887. He originally served as a sailor of the imperial yacht. He served the former Imperial family during their exile in Siberia during the Russian Revolution.

He and Ivan Dmitrievich Sednev, another former Russian imperial sailor, were killed shortly before the murder of the Romanov family, on 28 June 1918 in Yekaterinburg.^[2]