Board Thread:Bug Reports/@comment-25565811-20190325214322/@comment-27219153-20190326004952

I imagine it was to avoid confusion since there was originally only one carved brick crafted from these, whereas now there are two, the other being Carved Black Umbar Brick. The Carved Black Gondor Brick has the tree on it, and thus makes sense for it to be called Gondor rather than Númenórean.