Lunarians (Lunarian: Lô-ku [lo˧˧ ku˧˧]) are the people of the Moon. whether they are humans or something unique is dubious, however most Lunarians see "Lunarian" as either a race, ethnicity, or nationality, rather than a species.
when referred to as a unique species, they're Homo lunaris or Homo sapiens lunaris. this has been mostly discredited. they're more commonly seen as Variant Humans. the first Lunarians are called người Nhất, and all the Lunarians who have come after that original group are called người Hai. (người Sau is used on occasion, but is significantly less common than Hai.)
the semi-regular arrival of Earthling humans minimizes genetic drift and stops Lunarians from fully breaking off as a unique species. most Lunarians have tanned skin, due to both the mixed African-Asian-Native American-Aboriginal Austrailian heritage and the harsh Sun.
while they've been able to artificially create a thicker atmosphere and raise the gravity on the Moon, the gravity is still slightly lower than on Earth (~8m/s² instead of 9.8m/s²). thus, Lunarians are required to be significantly more active than Earthlings in order to keep themselves healty.