Zacharius said
A lot of houses can trace their lineage back before the conquest, the only real houses that can be pinned down as not being around in the new setting are those with Valyrian blood or the few that are mentioned as cropping up since then.The Kingdoms certainly did interact, they just didn't all collectively bow to a single distant throne, you'll probably find, beyond some amount of development, the lives of most minor lords and the peasants was pretty similar.

Ruby said
I've dropped the Martells, Zach's dropped Lannister and Velaryon, and I don't know what Sini plans for his Houses.

Sini said
I did not pick up any major houses this time. As far as I am concerned, I would have players take their pick first, before I step in with my own choice of houses. There is plenty to choose from for everyone :).