Herumor

[Robomir]

OR Borlas is an extremely wise old man who recognises the evil that is inherent in the souls of all men.

I think this is the more likely as Borlas is pretty old and he remebers the shadow of the third age. Also if this evil does date from a long time ago it is surprising that there are not more mentions of a Herumor in the past, rather than just a black Numenorian Captain of which there is very little information about.