Isaac "Pop" Folkoff also known as "Volkov," (1881 -1975), was a senior founding member of the California Communist Party and West Coast liaison between Soviet intelligence and the Communist Party USA (CPUSA).
A former garment presser and self-taught Marxist philosopher, Folkoff specialized in fund-raising for party causes.
He was in charge of West Coast operations. He worked as a courier passing information to and from Soviet sources, and as a talent spotter and vetter of potential espionage recruits. He also worked as a Case Officer. His code name in Soviet intelligence and in the Venona files was "Uncle".
West Coast-Head : "The Old Man"-Volkov is his real name - daughter a Comintern courier. He knows the West Coast underground-Residence: San Francisco or Oakland
When Grigory Markovich Kheifitz, formerly personal secretary to Lenin's wife Nadezhda Krupskaya, came to San Francisco in 1941, he began meeting with Folkoff to develop information and recruit intelligence workers among American Communists.
Folkoff married Minni. 1930 census data shows that their niece Minnie Folkoff and nephew Robert Folkoff lived with them at the time. Robert Folkoff was a veteran of World War I.
- Chambers, Whittaker (1952). Witness. New York: Random House. p. 468. LCCN 52005149.
- Schwartz, Stephen (26 July 1996). "Soviet Spies Cast a Wide Net in S.F.: Decoded messages reveal activities of KGB in the '40s". San Francisco Chronicle. Retrieved 4 March 2013.
- John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America (New Haven: Yale University Press, 1999), ISBN 0300077718, p. 357
- "18 April Isaac Folkoff". National Security Agency. Retrieved 4 March 2013.
- "18 May Isaac Folkoff". National Security Agency. Retrieved 4 March 2013.