Hey there, I'm a long-time lurker, first time poster, and these boards have often been a good source of information along with A Wiki of Ice and Fire. Trying to gather correct information on the workings of Westeros and it's laws and customs is quite important to me as I'm a very active ASOIAF role player and spend most of my spare time on it in an online community.
Certain laws aren't entirely clear to me though and despite a good search through the books and various sites (including this forum) I haven't been able to find an answer to the following question:
What happens to the land and keep(s) of a House when the last family member dies?
The assumption my role play community currently goes by is that the lands become owned by the crown, who can then decide to hand it out to whomever they'd like. But I kinda always felt that this creates a bit of conflict with the Lord Paramounts of a region. Say for example lands in the Reach fall without owner and the crown decides to hand it to a close friend in King's Landing, it might perhaps annoy the Tyrells that they suddenly have to accept a vassal in their region whom they're not entirely agreeable with?