[Humphrey Hacker]

I guess it makes sense to use some "odder" and/or more exotic-sounding Latinate names for certain regions in order to bring different regions together, generic names wouldn't have worked, it's not the first time this happens in the world in general.
Better than these "strange" American soulless station names.
Central sounds particularly fine, Meridian slightly less (but really, not so much)

I mean, eventually had Granada not been found as a compromise, something à la Boreal/Septentrion (meaning northern) would have worked too

PERSONALLY, the only one I don't get a grip on, is the usage of Yorkshire on non-Yorkshire regions, which sounds a bit inconsistent.

I realize Yorkshire is a strong regional name, but using it for eastern Lincolnshire, hmm,...

EDIT: I take it back, "Meridian" also can mean "meridional" (southern), so it works fine

What's in a name? In relation to channel names a hell of a lot:

Yorkshire and STV reinforces the identities of those parts of the UK (or British Isles)
Thames because of the equating of London and the River Thames.