For the composer born with this name, see Isidore de Lara Isidore Cohen (December 16, 1922 in Brooklyn, New York – June 23, 2005 in Bronx, New York) was a renowned chamber musician and violinist and member, at different times, of both the Juilliard String Quartet and the Beaux Arts Trio. Beginning in 1958, Cohen became second violinist of the Juilliard String Quartet, a post he held for nearly a decade. As a member of the quartet, Cohen also served on faculty at Juilliard from 1958 to 1966.