Records of ancient origin ascribe the role of land-grant authority to the Ọba'lúmọ̀, monarch of Ìsẹ̀dó. Some oral historians report that at the request of Oduduwa’s fourth son, named Fagbamila, nicknamed and later styled Ọ̀ràngún, the region’s king Ọba'lúmọ̀ gave land-grants to the later arriving Ọ̀ràngún immigrants at a location sufficiently distant from Ìsẹ̀dó’s location. Another, seemingly more reliable version of the oral history, indicates that the land-grant occurred a few centuries later, when the faction of the younger of two quarreling princes arrived from the Ìlá Yàrà realm in the vicinity of the Ọba'lúmọ̀'s Ìsẹ̀dó kingdom. This younger prince, Arutu Oluokun, founded Ila-Magbon. This new monarchy was forced to move within a short time to establish another settlement at Ìlá-Ogbogbo (or Odò-Ìlá) (meaning Ìlá of the lowlands) which is the settlement that became the modern Ìlá Ọ̀ràngún.