The Afro-Brazilian religion of Candomblé arose during the Atlantic slave trade and has unmistakable Yorùbá influences. In the city of Salvador, the term nação ketu [Ketu nation] is used among the oldest temples in describing Yorùbá heritage. This has led some scholars to assume that the founders came from the Yorùbá kingdom by that name. This paper critically examines the idea of Kétu origins, taking as a case study the temple Ilê Axé Iyá Nassô Oká, a national historic heritage site in Brazil that is recognized by UNESCO as a site of diasporic memory. The paper shows that the first generations of leadership were dominated by people from Ọ̀yọ́ and that the term ketu emerged not as an allusion to ethnic origins but perhaps as a metaphor for a heterogeneous cultural context in which Yorùbá speakers from disparate regions lived in close coexistence.