https://arxiv.org/search/cs?searchtype=author&query=Nguyen,+...

Wikipedia mentions that up to ~40% of the Vietnamese population (~40,000,000 people) carries the name Nguyen:

https://en.wikipedia.org/wiki/Nguyen

For the paper itself, as someone working in the field, I find it interesting enough to consider reading at some point (I do not read that many analysis papers recently, but this one looks better than most). As for your accusation about it claiming that large language models are simply n-gram models, read the abstract until you realise that your accusation is very much unfair to the work.

Chances are, you just assumed all the search results for 'Nguyen, T' refer to the same author.