The author is a Celtophile obviously, the subject itself hints at that and so does the way it is built and formulated (unless the OP has rewritten it in English with less knowledge of sophisticted and academic versions of it- no slight intended, your English is fine, but the article is not written in the sort of language in which you publish research).

I suspect it all comes down to what Watchman says (though I daresay the Finns/Lapps giving name to your own country seem unrelated to the rest of us) and that someone (read "one of the numerous Celtophiles who seem to be everywhere these days propagating the greatness of Celts") has overinterpreted this common similarity. I need to see much more evidence before I am convinced.