Bozjan lore is properly scuffed.

[Ashlyn_Ishina]

I don't think there's anything saying that Bozja stopped being a monarchy, just that they eventually stopped being so weird about it. Chances are that by the time of its fall, the Bozjan royal family had lost a lot of its mythical luster and was a bit more ceremonial and more of a figurehead. Similar to what happened to... well, every real-life royal family, but most obviously to English-speaking audiences the British one.

Of course, that doesn't mean there weren't royalists--again, look at Britain. Radovan checks out, he just has less of a grandiose mythical angle and is more of a staunch loyalist to his country.

The Gunnhildr line would've hit problems the moment that there were no female heirs, anyway, which is kind of an easy roadblock for them to hit.

The issue is that within the StQ area and line, it says that ALL Queens of Bozja are named Queen Gunnhildr. It is both a name and title.