You have to learn more before lying here.
Yue is ancient word of people are living in Southern China. Chinese recorded the sound in in Chinese with writing character as Yue
越 or
粵.. Vietnamese belong to Luo Yue, in Vietnamese : Lạc Việt.
Vietnamese call them as people of
Lạc or ancient pronounciation:
Nác (nước). This word in original meaning for
water, today in some rural area people say
nác in Vietnamese it mean water, so that Vietnamese call them:
giống Lạc, in English: People living by water (river or sea).
It's interesting that in Vietnamese we say:
Đất Nước, in English word: Soil + Water, meaning in English is word: Country. In other word: there is Soil of Lạc People. Other explanation is that : Soil + Water => Đất + Nước, meaning in English: Country.