alt Hacker NewsFinland has some naming rules, but they don't necessarily apply to everyone in the country because they're rules for naming people born here, rather than those who later moved here.
There is a public index of forenames and surnames which I learned about when I was with my pregnant wife, and back then I was obsessively searching for my/our surname to see it increase by one when our newborn was registered and became "official".
Apparently within the whole of Finland there 22 men with the same surname as me, and 25 women. 21 of these people are in Finland and 26 are abroad but known.
Interestingly if I go to the forename search and look for people named "Steve" there are < 5 women with that name (i.e. non-zero, but the number masked for privacy reasons):
https://nimipalvelu.dvv.fi/en/forename-search?name=Steve
I'm curious about the origin there, though of course I've seen Steve -> Steffan -> Stephany, and similar translations in the past.
That sent me down a rabbit hole. Seems like having rules on what you can name your own kid are in place in several European countries. From an American perspective, I find this simultaneously off-putting (you are going to tell ME what I can name MY OWN child?!!) and also probably a net positive. I've often thought that a lot of tragedeighs could be averted if hospital registrars ran the names through a checker and pushed back on the parents to verify they really wanted that. But that's based on an assumption that it's often not intentional.