His grandfather , Julius Isserlis , who was a Russian Jew , was one of 12 musicians allowed to leave Russia in the 1920s to promote Russian culture , but he never returned .
Isserlis was born in London on 19 December 1958 into a musical family .
Isserlis ' grandfather , Julius Isserlis , who was a Russian Jew , was one of 12 musicians allowed to leave Russia in the 1920s to promote Russian culture , but he never returned .
Isserlis was born in London on 19 December 1958 into a musical family .