Jurij Lavrovitch Karnovich (1884-1941), was a pupil of Rimsky-Korsakov, Liadov and Glazunow in St.Petersburg. He stayed in that city as a music teacher until 1927. He then moved to his native country Lituania and founded the National Opera.
His style of composing is called 'linear', related to Bartok and the French 'Groupe de Six'.
Karnovich is not mentioned in later Russian music publications.