From ọ̀san + yìn, of unclear origin. A few etymological theories exist: * An origin myth of Ọ̀sanyìn attributes it from the phrase ẹ̀san ẹyìn (“the reward for palm nuts”). A similar myth is repeated in the Odù Ifá chapter Ọ̀sẹ́ Ọ̀wọ́nrín (#232), where the name is said to come from the phrase ẹ̀sán ẹyìn (“the 9 palm nuts”). Both these myths identify the name as being associated Ọ̀rúnmìlà's role in his birth, with the second myth attributing Ọ̀sanyìn as his younger brother.