Наум Исаакович Эйтингон, генерал-майор НКВД, Ekho Moskvy (Moscow Echo) 06.09.2009: Interview of Nikita Petrov by Yevgeny Kiselyov (in Russian) – "As his immediate superior for many years, General Pavel Sudoplatov, recalled that, in the Lubyanka, Eitingon was known among his friends as Leonid Aleksandrovich; already in the 1920s, almost all Jewish Chekists took Russian names so as not to emphasize their national origin."
