The word "Xuan" originally refers to a car with a shed, and later it also refers to a corridor or hut with windows.
Ancient scholars often used the names of study and gallery.
The "what what Xuan" in the seal of calligraphy and painting is generally the name of the study gallery.
for instance
Celebrity study rooms named after "XXX Xuan" in past dynasties are:
The name of Ceng Gong's study is "Nanxuan".
"Cui Dixuan" is the name of Huang Tingjian's study.
Zhu's name is study.
Jia Xuan Xin Qiji (Song Dynasty writer) study name.
Ji Xiangxuan is the name of Gui Youguang's study.
The research name of Yao Nai, an ancient prose writer of Tongcheng School in Qing Dynasty.
The name of Cao Xueqin's study is Aihongxuan.
Mei Xuan: The name of Xu Zhimo's study.