**Abstract**

Through a comparative analysis, which uses as references Nahua narrative and Western thought, this chapter examines the relevance of the notion of alterity in different Mesoamerican myths, whose narratives display different ideas regarding origin and identity. In this case, comparative analysis allows us to distinguish between two different narrative traditions, one of which emphasizes the role of continuity and genealogy and another, on the contrary, which reveals the importance of otherness and discontinuous processes.

**Keywords:** Nahuas, mythology, alterity, origin, genealogy
