Aleksandr Aleksandrovich Kharkevich was a specialist in radio engineering, electronics, acoustics and instrumentation. He was a corresponding member in 1960 and an academician in 1964 of the Academy of Sciences of the Soviet Union.
Alexandr Mikhailovych Kondratov was a Russian linguist, biologist, journalist and poet. He wrote many books on subjects as varied as ancient and modern languages, history, mathematics, paleontology, geology, cryptozoology, and Atlantis. He also wrote poetry. He was the first Russian to write a monography about dinosaurs purportedly surviving into modern times.
Aleksandr Yefimovich Kurlyandsky was a Soviet and Russian writer, satirist, playwright, screenwriter, and author of books for children. He was born and died in Moscow, and was an Honored Art Worker of the Russian Federation (2007). He was also awarded the USSR State Prize (1988).
Aleksandr Gennadyevich Kurosh was a Soviet mathematician, known for his work in abstract algebra. He is credited with writing The Theory of Groups, the first modern and high-level text on group theory, published in 1944.