Nah, if I was going to take a player-made house I'd take something like House Cyir (it has a cool name and location!) But I don't think that's up for grabs.
More likely than not I'll be going here:
Is there anything else you could tell me about that region? Or should I make stuff up?
Good choice. This post might be poorly written because I'm in a hurry.
Let me start with climate: it will be cold most of the year -- obviously warmer and mild in the summer. Heavy, heavy snows, and a lot of rain when it's not cold enough for snow. Quite dreary winters, late falls, and early springs, honestly. However, some might say beautiful in a sense, because I imagine a lot of forests around there, and a dramatic change in colors when fall rolls around.
Historically, you have a lot of lee-way, but I'd prefer if you made a region that is not
too new. Having some background stemming from pre-Solemn Age might be appropriate, given the location. However, that doesn't mean your current line can't be new -- perhaps you were appointed over those holdings and that domain by Auren I after the War, or somesuch. I'm not being terribly creative here, my apologies. But really, that's your job.
Because the Aulesiri migrations moved southward, they very well could have originally missed that area because of its seemingly uninviting climate (compared to the south), but I imagine that eventually some form of settlement would have emerged because the land is capable of growing crops despite its climate, there is a coast there with ample fishing, and the rivers provide decent sources of fresh water. You could even get creative and come up with a Raayakin situation in the long past; perhaps even your house has some Raayakin blood. It's really what you want, and when you post a proposal, we can go over it; I'm not going to lie, you might have to change something. Also, there is a source of copper nearby -- you could come up with something interesting historically (perhaps the use of Raayakin slave labor to mine that copper, painting an even grimmer portrait -- if you want to). So: copper, forests with settled clearings, fishing, crops. You probably have a decent land area for producing timber, but not enough for export.
To your west, in between Ror and Korsrill, would not be much -- maybe you'd like to create that region, as well (both in relation to your house and as a world-building exercise). But I didn't imagine a massive grouping of settlements or any major cities in that land between Ror and Korsrill, but more scattered villages and not much else.
Look into House Godhart (Azale), as well, who would be your neighbor (along with Cyir). Also also, it might be worthwhile to look into what Thlayli posted on the region to your immediate west, which is a few pages back (not because you'll actually use that background, but just so you know the general situation so you can put yourself in some sort of context).
Oh, a really important thing: the resource map is off for your region. Wheat and rice are not grown there (since no one ever claimed land up there, I never changed it). Instead, I would say that hardy greens and roots such as spinach, peas, kale, turnips, rutabagas, beets, carrots, cabbage, celery, etc. would grow -- maybe potatoes planted in early spring, as well. Oh, and fruits such as apples and pears would be common. So you likely won't be exporting much food, but still capable of growing enough for your populace.
Hope this helps.