Adai (also Adaizan, Adaizi, Adaise, Adahi, Adaes, Adees, Atayos) is the name of a people and language that was spoken in northwestern Louisiana and were a Southeastern culture of Native Americans. The name Adai is derived from the Caddo word hadai meaning 'brushwood'.The Adai were among the first peoples in North America to experience European contact—and were profoundly affected. In 1530 Álvar Núñez Cabeza de Vaca writes of them using the name Atayos. The Adai subsequently moved away from their homeland. By 1820, there were only thirty persons remaining.
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