Bertheaume, Isidore, French violinist; b. Paris, c. 1752; d. St. Petersburg, March 20, 1802. A precocious musician, he joined the orch. of the Paris Opéra in 1767 and served there until 1769 and again from 1775 to 1781. He conducted the Concert Spirituel during the Revolution (1789–91), then left France and went to Germany. In 1801 he emigrated to Russia, where he served as first violinist in the Imperial Orch. in St. Petersburg. He composed 2 syms. concertantes for 2 Violins, 6 sonatas for Clavecin, with Violin, violin concertos, and other works for violin.
—Nicolas Slonimsky/Laura Kuhn/Dennis McIntire