- Racieski, Zbigniew1
- Reinhardt, Guenther1
- Reswick, William1
- Rezek, Román Sándor1
- Romanov, B. A.1
- Selznick, Philip1
- Semenov, N.1
- Sergii, Patriarch of Moscow and All Russia1
- Seton-Watson, Hugh1
- Smirnov, Sergeĭ1
- Smith, Charles Andrew1
- Sokolnicki, Michał1
- Song, Qingling1
- Stone, Isidor Feinstein1
- Strauss, Leo1
- Swearingen, Rodger1
- Tamási, Lajos1
- Tanner, Lawrence Edward1
- Trotsky, Léon1
- Ulam, Adam Bruno1