The Rau people (Zhuang: ), also known as Lao (; ), were an ethnic group of ancient China. Their descendants are the Zhuang, Buyei, TàyâÂÂNùng and other KraâÂÂDai-speaking peoples.
The ethnonym and autonym of the Lao people, together with the ethnonym of the Kra-speaking Gelao people, would have emerged from the Austro-Asiatic 'human being'.
The etymon would have also yielded the ethnonym / , a name given to the Vietnamese by Tai speaking peoples, currently slightly derogatory. In fact, / was an exonym used to refer to Tai speaking peoples, as in the epic poem of Thao Cheuang, and was only later applied to the Vietnamese. In Pupeo (Kra), kew is used to name the Tay (Central Tai) of North Vietnam.
The name Lao is used almost exclusively by the majority population of Laos, the Lao people, and two of the three other members of the Lao-Phutai subfamily of Southwestern Tai: Isan people (occasionally), Nyaw people and Phu Thai speakers.
The name Rau comes from Zhuang and means 'we, us'.
In Southern China, people speaking KamâÂÂTai (ZhuangâÂÂDong) languages are mainly found in Guangxi, Guizhou, Yunnan, Hunan, Guangdong and Hainan. According to statistics from the fourth census taken in China in 1990, the total population of these groups amounted to 23,262,000. Their distribution is as follows:
Kra peoples are reside in the Guangxi, Guizhou, Yunnan, Hunan and Hainan provinces of China, as well as in the HàGiang, Cao Bằng, Lào Cai and Sán La provinces of Vietnam.
KamâÂÂSui peoples are found in China (as Kam, Mulam, Maonan, etc.), as well as in neighboring portions of Northern Laos and Vietnam.
The center of the Saek population is the Mekong River in Central Laos. A smaller Saek community makes its home in the Isan region of Northeast Thailand, near the border with Laos.
Biao-speaking people are found in Guangdong, China.
Lakkia people are an ethnic group residing in Guangxi, China, and neighboring portions of Vietnam. They are of Yao descent but speak a TaiâÂÂKadai language called Lakkia. These Yao were likely in an area dominated by Tai speakers and assimilated an early TaiâÂÂKadai language (possibly the ancestor of the Biao language).