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.
Prince Mikhail Cantacuzène
Prince Mikhail Mikhailovich Cantacuzène, Count Speransky (; 29 April 1875 – 25 March 1955) was a Russian general. The title of Count Speransky has been alternatively spelled "Spiransky" and "Speranski".