As I'm still newish, and just reading stuff for the sake of it, I have strayed into the world of knights and kingdoms and whilst it is all completely beyond my comprehension, the attention to detail with the names and kingdoms, etc, etc astounds me. The amount of time you guys (and gals) are putting into this must be phenomenal. It's all absolutely amazing and I am seriously impressed.
Incidentally, reading further back about a duchy being more important than a county, as I understand it a county is purely geographical/administrative (at least in the UK it is). I live in what is wrongly referred to as The Duchy of Cornwall and can tell you a little bit about that (as you are so hot on the attention to detail). The county of Cornwall is an administrative county of England (although was once a kingdom in its own right, but that was a long time ago!). The Duchy of Cornwall refers to all of the land owned by the Duke of Cornwall (currently Prince Charles). Such land is spread across 23 counties, and comparatively little of it is in Cornwall itself!!
There are other duchies (duchys?) of course, and they may not be organised like this one, but the website is interesting, and here's a map of the Duchy of Cornwall (for those of you not familiar with the UK, the county of Cornwall is the pointy bit on the left

).
http://www.duchyofcornwall.org/aroundtheduchy.htm