The issue of the name of Rubinstein - one of the most famous pianists of all time is not limited to determining whether his name should be written in the English version of "Arthur" or the Polish version "Artur". It turns out that the seventh descendant of Felicja and Isaac Rubinstein, who was never to be born (but thanks to the encouragement of Sister Salomea - called "Salka" - Felicja decided not to terminate her pregnancy) was to receive the name Leon. How did it happen that he became Arthur?