Here are some of the informations I like to share with those who is interested in our ethnic back ground. Most of this informations are gathered from the Chinese manuscripts and translated into French language.
Under the repression of another powerful kingdom in old China, Aï Lao under different identity, emigrated towards the South. Several groups managed to found each one their kingdom in a new territory. Of other under L (identity TaïLao or Lao, under the direction of Khun Borom (Piluoge), still king of Nan Chao, towards 730 apr. J-C., took their exodus according to Nam-Or (Laos), the red river and the black river in Tonkin with the conquest of new territories among the people Krom, Môn, Môn-Khmer.
Khun Borom sent its seven sons in the seven Lao principalities in the Indochinese Peninsula to take them in hand with knowing
$ Khun Lo, wire elder and heir to the throne of Nan Chao, control Lane Xang (Muong-Swa or Luang Prabang);
$ Chief-Chueng reign on Muong-Phouane (Xieng-Khouang, Northern Lao)
$ Khamphong, on Lanna (current area of the North of Thailand).
$ Chusong, on Ngé-Ang (Annam).
$ Kom, on Khamkeut (in the current province of Khammuane, Laos).
$ Kgua-Inh, on Lane-Phia (Ayuthaya), and
$ Yue-Phalane (Gniphalane), on Yunnan.
Will add more and provide reference at the end if anyone is interested.