Alexander Alexandrovich Kotov was a Soviet chess grandmaster and author. He was a Soviet chess champion, a two-time world title Candidate, and a prolific writer on the subject of chess. Kotov served in high posts in the Soviet Chess Federation, and wrote most of his books during the Cold War. The importance and breadth of Kotov's work rank him among the all-time greats in this field.

Alexander Diomidovich Kravchenko was a Russian revolutionary, agronomist and partisan who fought against Admiral Kolchak's White forces in Siberia in 1919 during the Russian Civil War.

Alexander Abramovich Krein was a Soviet composer.

Alexander Vasilyevich Kruglov was a Russian writer, poet, publicist, biographer and editor.

Alexander Krylov is a German scientist, specializing in social and economical sciences.

Alexander Kubalov (Ossetian: Дзугаты Георги) (1871, Stary Batakoyurt, Terek Oblast – 1937) was an Ossetian writer.

Alexander Rafailovich Kugel was a Russian and Soviet theatre critic and editor, founder of the False Mirror, a popular theatre of parodies.

Alexander Petrovich Kunitsyn was a Russian lawyer, professor, Active State Councillor. He was a favourite teacher of the Russian poet and playwright, Alexander Pushkin.

Alexander Semyonovich Kushner is a Russian poet from Saint Petersburg.

Alexander Nikoloz Kutateli Georgian: ალექსანდრე ნიკოლოზის ძე ქუთათელი; 6 September 1897 – 1 May 1982) was a Georgian and Soviet writer and translator.