Board Thread:Suggestions forum/@comment-26149161-20160212211558/@comment-26149161-20160214140241

Ok. But as far as I know, there were only the Breelanders, Hillmen, Men of Eryn Vorn, and Dunedain in Eriador. The Lone-Lands were, as it's name suggests, mostly deserted, and Eriador literally means "lonely land". I imagine Bree will be it's own faction, and Eryn Vorn will be part of an Enedwaith faction.

Another article: http://middle-earth.xenite.org/2011/12/16/how-deserted-was-eriador-in-the-late-third-age/