Alternate Names: Haat, Hat, ’Iduh, O Du, “Tay Hat” (pej.)
Genealogy:
Demographics: 300 in Viet Nam (1999 census). Population total all countries: 950. Ethnic population: 380 (2009 census).
Language Use: Middle-aged and older.
Nation of Origin: Viet Nam
Other Comments: Official ethnic community. Call themselves O Du. Traditional religion.