The five-element attribute of the character Xuan is fire. According to the principle that fire overcomes metal in the five elements, it is taboo to name the character Xuan with characters that belong to the five elements metal;
The taboo of naming the character Xuan is the same as Names with the final rhyme uān or characters with the same tone as Yinping are difficult to pronounce and have no sense of rhythm. It is taboo to name the character Xuan with the same character as the ancestors. If the ancestor's name contains the character Xuan, the younger generation is taboo to name it with the character Xuan.