Koivenen... sounds like one of the heroes in Kalevala. The one who was the model for Turin Turambar, maybe? And yes, it's obvious that Numenor = Atlantis. The Valar are clearly representative of most pantheons (Greco-Roman and Norse at the very least)
Mine!
The Koivenen in my home town was a doctor. Or maybe he was a dentist. In either case, I don't recall him ever marrying his amnesiac sister.
Hmm... finding a good translation of the Kalevalala to read would be a good research project for me, I think.
Mine?