Well, it happens I like to look at stuff like that, these "not-too-common" things. I like it, because you can see stories or characters behind it that you'd otherwise pay a little attention to. And since the story of the Arnorian chieftains is very elaborate, I have the bits of it in my mind
Okay, it took me now some time, since I was trying to come up also with something "not too ordinary"... I hope this will be interesting enough:
Who was the person whom even the Lord of the Nazgul feared, but who received a Morgul-wound and died?