Jan Hambourg was born in Voronezh , Russia , the middle brother between the famous pianist Mark Hambourg ( b . Jan Hambourg was born in Voronezh , Russia , the intermediate brother between the famous pianist Mark Hambourg .
Jan Hambourg dilahirkan di Voronezh, Rusia, saudara tengah antara pemain piano terkenal Mark Hambourg (b. Jan Hambourg dilahirkan di Voronezh, Rusia, saudara perantaraan antara pemain piano terkenal Mark Hambourg.