Not technically an answer but perhaps the absence is surprising / of interest to someone:

We don’t typically do this in the Netherlands. I find it very strange to call someone something that isn’t their name (or at least a part thereof if the parents chose something unwieldy), especially to the point where a culture develops a set of default secondary names based on their real first name. Mostly obvious ones but sometimes also entirely unguessable. I learned this is a thing in other countries from my German partner

We do have birth names (some biblical crap, like the holy Johannes for someone called Jo) but it’s not like they’d ever introduce themselves to anyone as such (not even when meeting the king). It’s not their name, their parent doesn’t say it when they’ve done something wrong, and I doubt they’d respond to it if it’s not super obvious from other clues that you mean them. It’s just there for ceremonies at church altars and airport terminals