I don't know about Sweden, but it is the case in my native Poland.
In fact, I think it's much more common than full liberty in this regard.
As for the level of strictness - it's always a bit arbitrary, and there are no fool-proof guidelines, nor a predefined whitelist.
Generally speaking, however, the name cannot be ridiculous, humiliating, offensive, it must be in a full form (not affectionate) etc.
Among the rejected ones there have been "Rambo" and "Joint".
There were parents who tried "Wiedźmin" (Witcher), to no avail, but they succeeded eventually with a compromise, a slightly altered "Wiedzimin". Not a real name, but kinda sounds like it might be (sort of similar to Lithuanian Giedymin), and by itself not a popculture reference, which apparently was what the office considered frivolous/inappropriate.
In fact, I think it's much more common than full liberty in this regard.
As for the level of strictness - it's always a bit arbitrary, and there are no fool-proof guidelines, nor a predefined whitelist.
Generally speaking, however, the name cannot be ridiculous, humiliating, offensive, it must be in a full form (not affectionate) etc.
Among the rejected ones there have been "Rambo" and "Joint".
There were parents who tried "Wiedźmin" (Witcher), to no avail, but they succeeded eventually with a compromise, a slightly altered "Wiedzimin". Not a real name, but kinda sounds like it might be (sort of similar to Lithuanian Giedymin), and by itself not a popculture reference, which apparently was what the office considered frivolous/inappropriate.