There are, roughly speaking, two types of countries when it comes to names. One kind (like the UK) where you decide on your name and the government has to comply with it (after minimal paperwork and minimal expense). And the other kind (where I live) where your name is more or less set in stone after your birth, where it is subject to the whims of the approving official, where it is difficult and expensive to change at best, and sometimes impossible to change.
I'll refrain from going off on a naming tangent, but that stuff is wild.
Which defeats the purpose, because then your pseudonym is legally tied to your IRL identity in a way that may, depending on jurisdiction, be public or semi-public record.
I'll refrain from going off on a naming tangent, but that stuff is wild.