Pancho's maternal grandfather, Leon Pasternak, a Russian Jew who left Odessa and settled in Zurich a few years before Pancho's birth, was a very influential figure in Pancho's musical development and later success.
O avó materno de Pancho, Leon Pasternak, xudeu ruso que abandonou Odesa e se instalou en Zúric uns anos antes do nacemento de Pancho, foi unha figura moi influente no seu desenvolvemento musical e no seu posterior éxito.