gengwall

Granted, this is not extensive research, but…

The wikipedia article on the Greek goddess Artemis has a section discussing her as the lady of Ephesus. The article even mentions the story from Acts.

The wikipedia article on Diana also associates her with the Greek goddess Artemis AND places worship of her in Ephesus. The reference there to the “Anatolian ‘Diana’ of Ephesus” refers to how she was portrayed (or more specifically, dressed) in statues and other depictions, but does not suggest either Diana or Artemis in Ephesus were anything other than the corresponding Greek and Roman goddesses.

The article on the temple at Ephesus clearly states that, at least in its last two constructions, it was a thoroughly Greek temple to the thoroughly Greek goddess, and that it was “known less precisely as Temple of Diana”. The article does discuss pre-Greek temples and icons of “the lady of Ephesus” dating further back than any Greek influence in the region: “At Ephesus, a goddess whom the Greeks associated with Artemis was passionately venerated in an archaic, certainly pre-Hellenic cult image”. But any pre-Hellenic personality would have been forgotten as the Greek culture assimilated and synthesized “the Lady of Ephesus” into Artemis.

What is absolutely indisputable is that “Artemis” is the name used in the Greek in the account in Acts by the worshippers in the city of Ephesus. What is also indisputable was that Diana was the Roman equivalent of the Greek goddess Artemis. I would be interested in what research you have seen that indicates the Artemis of 1st Century Ephesus is not the Greek Artemis.