Adeniyi is essentially a twin word from Yoruba language spoken predominantly in south western part of Nigeria. Ade means crown or kingship which connotes either a royal lineage or royal wish by the parents who name such child with the Ade prefix. Niyi (Ni iyi) literally means 'to have (ni) honour or fame (iyi). Adeniyi therefore translates to crown has honour.
(Sent from: niyi osinowo)