I imagine it's to protect children from the Elon Musks of the world. There's a handful of rules that concern first names in Finland that allow to reject names that are bit "out there" so to speak.

For example, there's such rejected first names as "Marihuana", "Avicii", "Kapteeni" (Captain), "Salaisuus" (Secret), "Noppa" (Dice), "Hoito Virhe" ("Medicial Malpractice" as first and last name) and "Sukka" (Sock). Guess the idea that giving a boy a girl's name can have a similar effect for the child as naming them "Sock".

> I imagine it's to protect children from the Elon Musks of the world.

Hade to look that up. He apparently named his son "X Æ A-12": https://www.bbc.com/news/world-us-canada-52557291 . Will probably create some issues with future IT-systems. I know a "Jo Å" and he have trouble registering for services from time to time.

It's actually "X AE A-XII" now since "X Æ A-12" was against California law.