Mon Keo was the king of the Laotian Kingdom of Lan Xang between 1627 and 1633, Reigning with the regnal name of Samdach Brhat-Anya Chao Manikya Kaeva Raja Sri Sadhana Kanayudha, he was the son of King Voravongsa II and brother of King Ouphagnauvarath I.His reign was filled with quarrels and rebellions between various claimants to the throne. Wikipedia