Samsenethai

King Samsenethai
King of Lan Xang
Reign	1373–1416
Predecessor	Fa Ngum
Successor	Lan Kham Deng
Issue	Princess Keo Koumari Princess Anousa Princess Manora Princess Souphutta Princess Siva Yaka Prince Lan Kham Deng Prince Sai Prince Khamteam Prince Kongkeo Prince Leu Xay Prince Fa Kheun
House	Lan Xang
Father	Fa Ngum

Samsenethai (also called Un Heuan) was the second king of Lan Xang, the son of Fa Ngum, whom he succeeded.

He ruled from 1373 until 1416. The origin of the name Samsenethai is thought to be a reflection of the political and social upheaval occurring within the area at the time of his rule. Samsenethai literally means "300,000 Thai," thus reflected the result of a census conducted in his reign. It is unclear whether the census included the entire population or just men capable of bearing arms.

There is also discussion as to whether during this period, the terms "Thai" and "Lao" were interchangeable, whether the term "Lao" yet existed, or whether "Thai" was used in his name to refer to the fact that the census included all Tai groups. For the duration of 43 year reign, Lan Xang did not fight a single battle.

Samsenethai had five daughters; Princess Keo Koumari, Princess Anousa, Princess Manora, Princess Souphutta, and Princess Siva Yaka. He had three sons by Princess Ngo Fa of Ayutthaya; Prince Lan Kham Deng, Prince Sai, Prince Khamteam. His other sons, Prince Kongkeo, Prince Leu Xay, and Prince Fa Kheun 's mother was Princess Noy Onsa of Lan Na.

Wat Manorom, Wat Ubosot, and Wat Chiang Kham were built in Samsenethai's reign. He was succeeded by his son Lan Kham Deng.