There are various accounts of the origin of "Okebadan" but there is a common agreement among them with the resolution that Lagelu: Oro Apata-Maja, who was the founder of Ibadan, was also the one that established Okebadan.
The first account according to Femi Osofisan in the prologue he wrote for a book [Ibadan Mesiogo], says dissident soldiers from Oyo, Ife and Ijebu all came to the place called Ebaodan to settle after the sacking of Owu which was as a result of the disintegration of the old Oyo Empire. This new settlement was a savannah land backing the forest of the Egba. Among these dissident soldiers was a great warrior called Lagelu from Ife who became their leader. He consulted an oracle on-behalf of the new settlers to enable them know the future of their new settlement and he was told that they should adopt [Eleyele Hill] as their guardian deity. Eleyele Hill then became Okebadan Hill.
...