Americans who joined for fighting and created United States in 17th century, they are native American, but they should been in different ethnic groupes based on Bloodlines and Languages.
New comer to America; like Arabish, Indian, Chinese or Vietnamese ..., this people with new bloodline and language or in different ethnic groups do not considered as native American.
NanYue people joined for creation NanYue Guo in time BC, and fighting against invasion of Han Empere, they are native NanYue people, if they shared common bloodline and language, NanYue people is independence ethnic group.
New comers to NanYue Guo; like Hokkien, Hakka, Hans etc with new bloodlines and languages, they are not considered as native NanYue Guo people or with another wording: Hans, Hakka, Hokkien, etc are not considered as native ethnic group.