Red Hill folk

The Red Hill Folk or Cerens were a group of Eriadorian tribesmen who inhabited the Pinnath Ceren in northwestern Minhiriath and south of Buckland and the Old Forest.They were largely the descendants of Downsmen and Cardolanian Northmen and were known for their stern and agressive behaviour, that often led to troubles with their peace-loving Hobbit neighbours.

In The Lord of The Rings Books
In the Lord of the Rings Books it is stated that no men had settled dwellings so far west or within a hundred leagues of the Shire.On the other Hand it is stated in the Lord of the Rings hat the Hobbits of the Southfarthing had troubles with men, indicating men near the southern borders of the Shire, probably along the Baranduin.This might either indicate that these men who lived south of the shire might have been either nomads or at least that their settlements were small, thinly populated or instable in comparison to breeland and the shire.