Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Sergei Prokopovich
In 1917 Prokopovich and Kuskova welcomed the February Revolution and re-joined the Menshevik Social-Democratic party. Prokopovich held several ministerial portfolios in the Alexander Kerensky government. He was an active member of the irregular freemasonic lodge, the Grand Orient of Russia’s Peoples. He opposed the October Revolution and briefly tried to lead an anti-Bolshevik government in Moscow. This was quickly dispersed. In 1921, Prokopovich devoted himself to famine relief. The contacts to American and Western European aid agencies he forged in this capacity were later held against him, and in 1922 he was expelled from the Soviet Union. In exile he published the journals, including "Ekonomicheskii sbornik" (Economic Review) and "Russkii ekonomicheskii sbornik" (Russian Economic Review). In 1939, as the Second World War broke out, Prokopovich and Kuskova moved to Switzerland, where he died in Geneve in 1955.