The way I'm picturing it is you have the more "civilized" bits around the bay that contain the feudal kingdoms which border on the mountains to the east, then you have horse tribes at least along the southern part of High Rock, then further east you get to the Reach. What do we know of this middle part between western and eastern High Rock? What about the norther bits around Northpoint?
Also, where is Daggerfall? On the older maps from daggerfall it is on the southeastern tip of High Rock sitting on the bay, put on more recent maps it appears to the southwest, on the opposite side of side of the tip.
As for names the 1st Edition pocket guide claims that naming customs are similar throughout the province. That doesn't seem to be the case anymore though. Looking at lists of Breton names on UESP the surnames from Daggerfall are English sounding. But as the series progresses they start taking on a much more French style. In Skyrim, the Reachmen tend to have a more Gaelic(?) look to them. Would you think that due to fact that High Rock traditionally has hundreds of small kingdoms, different naming customs have started appearing in the different areas?
The way I've been looking at it is as you go east from the Wrothgarians the people get more and more wild in self reliant little areas, this is where I've picture the Madanach, Ainethatch and Ennoc style of Gaelic names (not all that familiar with Gaelic, thats what they appear like to me). Would there be then a split between the English/French style names between the kingdoms of Daggerfall and Wayrest?
Anyway, thats just mostly me thinking aloud, with a few questions. Any thoughts?