Aztlán (from , ) is the legendary ancestral home of the Aztec peoples. Aztecah is the Nahuatl word for "people from Aztlan". The place Aztlan is mentioned in several ethnohistorical sources dating from the colonial period, and each of them give different lists of the different tribal groups who participated in the migration from Aztlan to central Mexico, but the Mexica who went on to found Mexico-Tenochtitlan are mentioned in all of the accounts. Historians have speculated about the possible location of Aztlan and tend to place it either in northwestern Mexico or the southwest US, although there are significant doubts about whether the place is purely mythical or represents a historical reality.