I noticed that (the) Manicongo has some folkloric fame in afro-Brazilian culture, the/his name is mentioned in songs and seems to persist in the collective memory. I'd love to know if it's the Manicongo mentioned on these maps that people remember, or if it's the more general title ("king of the congo"), and if there's any story behind this persistent folk knowledge.
Wikipedia is thin on details, perhaps some Brazilian HN members can chime in here?