Julius or Jules Conus (Russian: Юлий Эдуардович Конюс, Yuly Eduardovich Konyus; 1 February 1869 – 3 January, 1942) was a Russian violinist and composer.
Conus was born in Moscow, the son of the pianist Eduard Conus. His brothers were the musicians
Georgi Conus and Lev Conus. All three brothers studied in the Moscow Conservatory; among their teachers were
Sergei Taneyev and
Anton Arensky. Following the Russian Revolution he emigrated to France, where his son, Serge Conus, was born. Another of his sons, Boris, married the daughter of
Sergei Rachmaninoff. Julius Conus returned to Moscow in 1939, dying there in 1942. His compositions include a concerto for violin which has been recorded by, among others, Jascha Heifetz.