Wiktionary
alaafin
n. An emperor of the http://en.wikipedia.org/wiki/Oyo%20Empire.
Wikipedia
Alaafin
Alaafin, or Man of the Palace in the Yoruba language, was the title of the emperor of the medieval Oyo empire of northwestern Yorubaland. It was retained through the fall of that state as the official title of the ceremonial ruler of the contemporary Oyo clan.