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Phommathat was the fourth king of Lan Xang (Laos) (ruled 1428–1429). He was Lan Kham Deng's oldest son. He was king for only 10 months. He was beheaded by Nang Keo Phimpha, his paternal aunt, in her successful attempt to seize power. He was succeeded by Nang Keo Phimpha's son, Khamtum.
Lan Kham Deng
|King of Lan Xang
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