Yep also happened to my family. There is a y in my family name, but that’s very uncommon in the Netherlands, my last name is of French origin. So some bureaucrat changed it to a Dutch y which is an ij and there was no time to correct it since my grandparents had to catch the boat to flee the former Dutch colony. Now my last name is constantly pronounced wrong. I’m probably going to change it in the future but in the Netherlands you are not allowed to change your name except for a few exceptions. And applying for a name change cost a lot of money and you won’t get it back if they reject it. So I probably have to get a lawyer to do it.