The ancient Hausa people of the present day Nigeria call Yoruba people of Oyo Ile, "YARRIBA" and Oyo Ile (capital of the Yoruba speaking People) was known to Hausa people as, "KATUNGA." You might have seen some European writers refer to Yoruba's as Yarriba's and Oyo Ile as Katunga. Do not be confuse, they are simply talking about Yoruba's from the Hausa point of view and historical account.
