User blog comment:Pippa's Ghost/Ideas for Agents -- Agent Hild/@comment-900674-20140504180450

Also, on Dunland: yep, the Rohirrim were downright racist towards the original inhabitants of their country; hopefully Eomer made a few changes. As to names: the language of the Dunlendings is the one we have one who word for ('Forgoil', straw-heads). It looks like they were distantly related to the Haladin of Brethil, but they spent at least a thousand years isolated from everyone before the Numenoreans returned, and were then fairly heavily oppressed... hmm, if Hild needs compatriots, the names in Tal-elmar might be of use.

Tal-elmar, if you don't happen to own The Peoples of Middle-earth is an unfinished Tolkien story featuring the Wild Men around Tharbad at the time the Numenoreans came. So it's five thousand years or so out of date by the time of the War of the Ring, but it could at least give you some hints (or, y'know, you could just use them. ;)) Names and notions in the story include:

Hazad Longbeard (who has seventeen sons - a good thing, apparently - and a five-foot beard) Tal-elmar Flint-eye, his son (and the nickname is not a translation) 'Tal-elmar had a strange belief... that the old should be treated kindly and with courtesy' Buldar, father of Hazad A battle at 'Ishmalog', against the Numenoreans Elmar, Numenorean forced wife of Buldar. It doesn't say whether 'Elmar' is her original name, or the name given to her after her capture. There's a very dubious hint later that it might mean 'Slave' in the local language. 'The Swans of Godbelgod', which is corrected from 'Dur nor-Belgoth'. The latter name looks almost Sindarin. 'Go-hilleg' as a name for the Numenoreans. Mogru, Master of the Hills of Agar, the local chieftain. Patronymics! 'Hazad uBuldar, Tal-elmar uHazad' A village named Udul

Still and all, there's barely anything - but maybe (just maybe) a comparison with the tongue of the Haladin could lead to some conclusions. I'll have to give it a go...