Below is a description of the power of women in the ancient Kongo Kingdom. Remember that a lot of African cultures are matriarchal. The description below is from 1704, and shows that there were women kings in Kongo, and also that the Kongo Empire had vassal kings who reported all to the one King of Kongo. There were also great queens like Queen Nzingha: Great Queen of Angola in neighboring kingdoms, to whom other kings reported. The text below has been translated to English by Dr. Y., Afrolegends.com.
The power of women in the Ancient Kongo Kingdom
In the evening I received the visit from a matron who was chief of her locality [Tubii] and other villages of the Sogno [Soyo] principality. She does not recognize any other authority above her but that of the King of Kongo. These villages are always governed by women.
Lorenzo da Lucca, 7th relation, Soyo, 31 January 1704 in Jean Cuvelier
Les Africains Vol.9, Editions J.A, C.-A. Julien, P. 58, (1977)