The term 'Yoruba' originates not from the Yoruba people themselves but from the Hausa language, where it was used to refer to the Oyo Empire, a major Yoruba kingdom. European writers and missionaries in the 19th century adopted this Hausa exonym, which then became standardized in English and other European languages. Over time, the people and their language came to be widely known by this externally applied name, even as the Yoruba refer to themselves and their language by various endonyms like 'Èdè Yorùbá'. The word's journey from a specific Hausa referent to a broad ethnolinguistic label illustrates the complex interplay of colonial documentation and linguistic identity.

The word 'Yoruba' is a simplex term. It is an exonym, a name given by outsiders, likely derived from a Hausa word referring to the people and their kingdom. Its linguistic origin is from the Hausa language, a Chadic language of the Afro-Asiatic family, and it functions as a proper noun/ethnonym.