Muna-batur (Butua or Abutua)
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Ibn Majid (1470) is the only author to mention this kingdom: The majority of those living between Sofala and Kilva (or Kagalwah) are infidels, who are called to arms, according to the name of Muna-batur, a great king whose will is followed by the infidels. He owns the center of Sofala, because he governs the eastern part of this region.
-Muna is explained by ibn-Madjid to be the name of the Kafirs between Sofala and Kilwa in conformity with the name of Muna-batura, the mighty king (Folio 92 verso), Muna corresponds to Mono- in Monomutapa or Monoe in Monoe-Mugi.
-Batura is maybe a reference to Butua where the gold came from.
The map of 1780 by Bellin shows Abutua kingdom in the left upper part on the Zambezi.
Taken from: The Archaeology of Khami and the Butua State by Tawanda Mukwende (2020)
The Butua state was one of the largest pre-colonial state systems, established in southern Africa in the early 15th century. A defining characteristic of the Butua state was its architecture, which is predominantly made up of terraced platforms built using the technology of dry-stone masonry. The Butua state thrived on mining of gold, cattle farming, agriculture, and local exchange of commodities as well as participation in global exchange networks through the Indian Ocean.
The earliest reference to the Butua state in historical records was made by Ahmad Ibn-Madjid. Ibn-Madjid made reference to the gold-mining activities in the Butua state. In particular, he noted that by this period the Butua were trading via the Zambezi River, thereby circumventing Great Zimbabwe in the process. Antonio Fernandes (1511) mentions the Butua state and makes reference to its gold mines and its strength, which he equated to that of the Mutapa state. The rise of the Butua state is said to have been precipitated by a decision in the early 15th century by the Sultanate of Angoche to establish alternative trading routes along the Zambezi River.