The identification of the various sub-groups of the Yoruba offers a challenge to historians, particularly since large numbers of Yoruba-speaking people were deported into the African diaspora. In this contribution to Yoruba historiography, Adediran analyses the history of the western Yoruba sub-groups, especially those resident in République du Benin and also in Togo. This study expands upon Adediran's Ph.D. thesis (Awolowo University, 1980) and is based on oral traditions and archival materials, as well as an excellent grasp of the published literature.