唐明皇

Etymology
明皇 is shortened from 至道大聖大明孝皇帝, the posthumous title of. The use of this appellation instead of 唐玄宗 is to observe the Chinese naming taboo custom and avoid the character, found in the personal names of Zhao Xuanlang , regarded as the ancestor of the royal family and granted the temple name 宋聖祖, and  of Qing, who was named 玄燁.