>Here are a couple of suggestions for you...

I'm guessing you looked this up in "Íslensk-Ensk
orðabók", Úlfgrímr; is that correct? That's often
a good starting point - but one should always check
the words in an ON-dictionary. They might have had
different meanings back then.

>> nobility
>This is just a guess, but "ágætir mann" would be
>famous/excellent man.

The number and case of the adjective must
agree with the number and case of the
noun. "Ágætir" is plural nominative
whereas "mann" is accusative singular.
Putting both words in nominative singular
we get "ágætr maðr".

Kveðja,
Haukur