Final answer:
The title of the Royal Spirit Head from the Benin Kingdom is the Osun Spirit Head.
Step-by-step explanation:
The kingdom of Benin in present day Nigeria is known for its exquisite bronze plaques and sculptures including the cast bronze head which portrayed an idealized likeness of the Oba when he was young. These sculptures were commissioned by the Oba and held sacred powers, forging a relationship between the materials used and the art.