471
Wynn, Arthur: Soviet intelligence source/agent, 1944. Described as radio expert and Communist in U.K.
Cover name in Vassiliev’s notebooks: “Scott”. As Wynn and “Scott”: Vassiliev White Notebook
#1, 107.
“X”: As “Mr. X”, pseudonym used by George Kennan in his essay “The Sources of Soviet Conduct,”
Foreign Affairs, July 1947.
Vassiliev Odd Pages, 25.
“X” (cover name in Vassiliev’s notebooks): “Mlad”/Hall reference to the Manhattan Project’s facilities at
Oak Ridge, Tennessee. Vassiliev Yellow Notebook #1, 21.
X (cover name in Venona): Joseph Katz. Venona New York KGB 1944, 463, 503, 520, 549–50, 580, 590,
608–09; Venona Special Studies, 30, 175.
“X” [Iks] (cover name in Vassiliev’s notebooks): Joseph Katz. (The cover name in transliterated
Russian is “Iks”, not the Cyrillic letter “X”.) Vassiliev Black Notebook, 51, 68, 78; Vassiliev
White Notebook #1, 55, 64, 84, 153–54; Vassiliev White Notebook #2, 2, 8, 10, 15, 18–20, 24,
30–34; Vassiliev White Notebook #3, 46–47, 74–78, 80, 91, 99, 105–08; Vassiliev Yellow
Notebook #2, 45, 64, 66–67, 73–75, 88.
“X” [Kh] (cover name in Vassiliev’s notebooks): Designation given the GRU agent “Kogan” in a 1941
KGB report. In the original text indicted by the Russian Cryillic letter “X”. The Russian
Cyrillic “X” transliterates as “Kh”, but in this case is functioning in the same way as the Latin
“X”, indicating an unnamed person, and in Vassiliev’s notebooks is left as “X”. Vassiliev Black
Notebook, 177–78.
“X” [Kh] (cover name in Vassiliev’s notebooks): Unidentified Soviet intelligence officer/agent,
mid-1920s. Possibly a ROSTA correspondent in the U.S. who reported to KGB. In the
original text indicted by the Russian Cryillic letter “X”. The Russian Cyrillic “X” transliterates as
“Kh”, but in this case is functioning in the same way as the Latin “X”, indicating an unnamed
person, and in Vassiliev’s notebooks is left as “X”. Vassiliev Yellow Notebook #4, 55.
X line: see XY line.
X-2 (X2): OSS counter-intelligence division. Vassiliev Yellow Notebook #2, 44.
X-4: German air-launched antiaircraft missile. Vassiliev White Notebook #3, 127; Vassiliev Yellow
Notebook #4, 141.
X-7: German anti-tank guided missile. Vassiliev Yellow Notebook #4, 141.
XP-58: Experimental American fighter aircraft. Venona San Francisco KGB, 10.
XP-81: Experimental American fighter aircraft. Venona New York KGB 1944, 133.
XY line [KhU line]: KGB scientific-technical line of work. Sometimes shortened to X line. While often
rendered in English with the Latin alphabet letters “XY”, this is a transfer without transliteration
of the Russian Cyrillic letter “XY”, which when transliterated from Russian would be KhU. As
XY: Vassiliev Black Notebook, 6, 22, 49, 68, 102–4, 107, 110, 113, 117, 127; Vassiliev White
Notebook #1, 8, 61, 107–9, 116–18, 136–37;
Vassiliev Yellow Notebook #1, 7–8, 23, 31. As X:
Vassiliev Black Notebook, 17, 97.
“Y” (cover name in Vassiliev’s notebooks): “Mlad”/Hall reference to the Manhattan Project’s facilities at
Los Alamos, New Mexico. (Likely derived from the Manhattan Project’s internal designation of
its facilities at Los Alamos as “Site Y”.) Vassiliev Yellow Notebook #1, 21.
Yagoda, Genrikh Grigor'evich: People's Commissar for Internal Affairs (chief of the NKVD, predecessor
to the KGB) from 1934 until 1936. Executed in 1938. Vassiliev Black Notebook, 8; Vassiliev
Yellow Notebook #2, 23, 35;
Vassiliev Yellow Notebook #4, 1, 3, 5, 45, 47–48, 55–57, 59–61,
65–66, 97, 106.
Yakhontoff, Victor Alexandrovich: Soviet intelligence contact/informant Former Tsartist general
turned pro-Soviet. Vassiliev Yellow Notebook #4, 9.
Yakimov, Rear Admiral Aleksandr Avdeevich: Soviet naval officer and Deputy Chairman, SGPC,
Washington. Venona USA Diplomatic, 63; Venona USA Trade, 29–30.
YAKOR' [ANCHOR] (cover name in Venona): ? Rud...ovich. Venona New York KGB 1941–42, 61;
Venona New York KGB 1944, 361; Venona Special Studies, 85.
472
“Yakov” (cover name in Vassiliev’s notebooks): Unidentified Soviet intelligence officer/agent, 1952,
likely operating from Vienna, liaison with Boris Morros in Europe in 1952. Vassiliev Yellow
Notebook #3, 82–85, 88, 91–93, 97.
YAKOV (cover name in Venona): Unidentified Soviet intelligence officer/agent, likely internal security.
Venona New York KGB 1944, 394–95;
Venona San Francisco KGB, 163, 165, 217–18;
Venona
Special Studies, 122.
YAKOV [JACOB and JAMES] (cover name in Venona): William Perl. Venona New York KGB 1944,
134, 462, 594, 621, 739–40; Venona New York KGB 1945, 64–65, 95, 138; Venona Special
Studies, 19, 85, 174.
Yakovlev, ?: Name in the Whalen documents, 1930. Vassiliev Yellow Notebook #4, 74.
Yakovlev, Anatoly Antonovich: Diplomatic pseudonym used by KGB officer Anatoly Yatskov. See
Anatoly Yatskov entry. As Yakovlev: Vassiliev White Notebook #1, 122; Vassiliev White
Notebook #2, 38;
Venona New York KGB 1943, 303;
Venona New York KGB 1944, 29, 45, 87,
96, 148, 226, 391, 405, 455, 473, 492, 639; Venona New York KGB 1945, 56, 168; Venona San
Francisco KGB, 257 (possible but not certain);
Venona Special Studies, 5.
Yakovlev, ? [A?]: Unidentified. The [A?] likely indicates that Venona analysts considered that this
might be Anatoly Yakovlev. Venona San Francisco KGB, 257.
Yakovlev, Captain: Senior Soviet naval officer in Moscow. Venona USA Naval GRU, 130.
Yakubovich, ?: Unidentified Soviet intelligence officer/agent. Venona New York KGB 1945, 162.
Yakubovsky, ?: Unidentified. Possibly Vasily Yakubovsky. Venona USA Diplomatic, 62.
Yakushev, M.N.: Soviet ship crewman, likely Soviet ship internal security source. Venona San
Francisco KGB, 260.
“Yakut”: Soviet ship. Venona San Francisco KGB, 111.
“Yakutsk”: Soviet ship. Venona USA Naval GRU, 106–7; Venona USA Trade, 26.
Yalta Conference: February 1945 meeting of Roosevelt, Churchill, and Stalin at Yalta, USSR. Also see
Crimea Conference. Vassiliev Black Notebook, 50; Vassiliev Yellow Notebook #4, 41, 121, 135;
Venona New York KGB 1945, 35–36; Venona Washington KGB, 20.
YAN [JAN] (cover name in Venona): Unidentified Soviet intelligence officer/agent, likely Soviet internal
security agent. Venona New York KGB 1944, 676–77; Venona Special Studies, 85.
“Yan Tomp”: Soviet ship. Venona USA Naval GRU, 72.
“Yang” (cover name in Vassiliev’s notebooks): Likely Howard Gochenour. “Yang” is described as a
chemist and an industrial espionage source recruited by Alfred Slack in a false flag recruitment.
Gochenour admitted to FBI that he supplied information to Slack, claiming that Slack said it was
for a South American buyer, not the Soviets.
198
Vassiliev Black Notebook, 110, 117; Vassiliev
Yellow Notebook #1, 102, 106.
“Yank” (cover name in Vassiliev’s notebooks): Likely Michael Greenberg. “Yank” was Soviet
intelligence contact/source described as male and a secretary of “Page” (Lauchlin Currie) in 1943
and providing valuable information about China via “Dir”/Price. Greenberg in 1942 became a
China specialist for the Board of Economic Warfare and an assistant to that agency’s de facto
head, Lauchlin Currie. He is also described in the notebooks under his real name as a contact of
Mary Price. He was identified by Elizabeth Bentley as one of her espionage sources who
provided informatin via Mary Price.
199
Vassiliev White Notebook #1, 52–53.
“Yankee” [Yanki] (cover name in Vassiliev’s notebooks): Unidentified Soviet intelligence source/agent,
1938. Vassiliev Black Notebook, 27, 101; Vassiliev White Notebook #1, 155.
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198. Alfred Slack FBI file #65-59183.
199. Bentley, “Deposition 1945,” 43.