Questions concerning Thranduil

[Ainaserkewen]

Even though there is all this info on the downs and in forums and other places, we still don't have the same info on the mirkwood elves than we have on the Noldor. I mean, You know who Elrond and Galadriel are, who their parents are, where they came from, their histories. The mirkwood elves seemed to have come out of nowhere.

A personal belief of mine is that Thranduil and his people are the descendants of Doriath Elves because for one, they lived in a forest, two they both lived in caves underground and it is possible that they could be the same kind of elves. Can anybody prove me wrong? Maybe I missed something.