Viet is an ethnic term, of unknown linguistic origin, that dates from well before the common era. In its Chinese form it could mean either "beyond," i.e., the peoples beyond the boundary (outsiders), or "hatchet," perhaps referring to a farm implement common to the region. Nam is a Chinese word meaning "south."
Vui. Vietnamese Origin. "Cheerful" The meaning of the name Vui is Cheerful. The origin of the name Vui is Vietnamese.