My Keplerians, a humanoid race that looks similar to humans on the outside but is not human, have a futuristic civilization on 1 planet and a stone age civilization on a similar planet. The futuristic civilization is what I am talking about in this question.
Musicians often start as children. In fact, finding a musician that did not start as a child is rare. But there is usually 1 child in the city who was able to read music before he/she could read words and who started on an instrument, typically the Keplerian equivalent of a violin, very early on. This child typically started composing not long after the child started playing an instrument. Reminds me of a certain composer. That composer is Wolfgang Amadeus Mozart. But there is no way that Keplerians would know about this composer.
That 1 child in the city is known as "Mozart of the city". Some actually decide to change their last name to Mozart but that takes 10 years to become official. There is a special maglev system for Keplerian composers, most of whom have Mozart in their name, either officially or colloquially. But if not from knowledge of Wolfgang Amadeus Mozart, what would cause Mozart to be as common of a name as it is for Keplerian musicians?