Worldwide, ナツキ (Natsuki 
, ナツキ , Natuki 
) is quite a rare epicene first name. The first name ナツキ is characteristic of Japan, where it is a rare dominantly feminine, but uncommonly male name, Sweden, where it is a rare feminine name, and Indonesia, where it is a very rare epicene name. In absolute terms, the name is most common in Japan, Indonesia, and the United States. Much more frequently, ナツキ is the last name as well as the forename.
ナツキ is also a name for the fictitious and mythical characters: Natsuki , the fictional character from Doki Doki Literature Club, Doki Doki Literature Club!; Natsuki Mogi , the fictional character from Initial D and Natsuki Kuga , the character on 'My-HiME', and 'My-Otome'..