Just to clarify I do not consider myself an expert on the lore of Tolkien's creation, though I know enough to get my bearings.

So the other day I was brushing up on the lore using this guide (https://www.lotro.com/en/forums/show...o-Middle-Earth)
I then get to the section describing the race of men and noticed it describes a culture of men I've never heard about in my time of reading up on Middle Earth. The Dorwinrim they are called, in my curiosity I search it up on Google expecting to read a page of it on Tolkien Gateway or Lotr wiki. To my surprise no links to said websites turned up on the results, instead I found an article on the MERP (Middle Earth Roleplay) wiki. Eventually I found that they are originated from MERP and not Tolkien himself (at least to my current understanding.)

This begs the question, is content present in the source books and used by MERP lore friendly to the roleplay that goes on in lotro? I know it's not entirely canon since none of it was made by Tolkien himself. In other words is it fair game if I want to play a Dorwinrim or decided I want to make a man originating from the crime ridden town of Strayhold?