Spot the Difference
There is something funny about having a name that is similar to a different word that already exists in the language. Whenever people hear your name, chances are that it will remind them of a different thing, which can be fun for them but annoying for you to deal with all the time.
We are willing to put money on the fact that Elon Musk has probably been made fun of his whole life for having a last name that sounds so similar to the word mask. And considering the past few years we all collectively had, he was probably reminded of that fact every day.