The Ơ Đu (O'du) are an aboriginal ethnic group in Vietnam and Laos. Their total population is more than 570.
The Ơ Đu are also commonly referred to as O'Du, O Du, Iduh, Tay Hat, Hat, and Haat.
The Ơ Đu subsist mainly on slash-and-burn agriculture and raising cattle, augmented by hunting, gathering, and weaving.
The Ơ Đu have a language also called O'du, which is a Khmuic language. The Khmuic languages are Austro-Asiatic. There is some debate as to whether the Khmuic languages are of the Mon–Khmer branch, but the majority opinion is that they are not. Most Ơ Đu presently speak Thai.
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