What is the origin of giving certain corners within houses own name?
I do not know of names for other corners of the house, but the southwestern corner is considered traditionally as the privileged site suitable for worshipping deities.


  《禮·曲禮》 爲人子者，居不主奧。


"The child does not live in the southwestern corner." In other words, one should show deference to one's parents by yielding the southwestern corner.