Hello,

I had built a regex from all the firstnames in wikidata and tested 130.000 – this is fine.
But if I would just need to know if the string exactly matches the wikidata name:

I think, therefore it is missing the ^ begin and the $ end tag.
Otherwise it is not very strict.

E.g. test for Sebastian :
Without /^...$/ it matches Se anything.
With /^...$/ it matches Sebastian.