Worldwide, Nigui (Nigui ) is an extremely rare epicene forename. Also, Nigui is the last name as well as the forename.
Ниги, 你桂, 倪吉, 倪贵, 坭桂, 妮吉, 妮桂, 妮龟, 尼吉, 尼贵, 尼鬼, 尼龜, and 尼龟