Complex sentence: It is not entirely clear whether he historically served as king or simply was an influential leader who used the power of his advice to run the affairs of the community through his younger brother, Dakodonou, who clearly was regarded as a king during his lifetime.
Split into simpler sentences: It is not entirely clear whether he historically served as king. He may simply have been an influential leader who used the power of his advice to run the affairs of the community through his younger brother, Dakodonou, who clearly was regarded as a king during his lifetime.