Mwami

Mwami () is an honorific title common in parts of Central and East Africa. The title means "chief" or "tribal chief" in several Bantu languages. It was historically used by kings in several African nations, and is still used for traditional kings or rulers of regions within several African nation-states.
Tribal chief.
In several Bantu languages − including Kirundi, Kinyarwanda, Nande, Lega, Luhya, and Chitonga − the word "mwami" means "tribal chief". It is used as a title for the leader of tribal societies or chiefdoms in areas where those languages are spoken.
In addition, "mwami" means either "chief" or "husband" in Luganda. It is used as a title for administrative chief in Luganda-speaking chiefdoms around the African Great Lakes region, though it can also be used as a general honorific for men, similar to English "Mr."
Traditional chiefs of the Lenje and the Ila people of Zambia, and the Tonga people of Zambia and Zimbabwe also use the honorific.
King.
In the Kingdom of Rwanda, the King of Rwanda was known as "mwami" (plural "abami"). Since 1961, the nation has been led by the president of Rwanda.
The Kingdom of Burundi was ruled by kings titled "mwami", followed by one of four regnal names that followed a repeating cycle. The President of Burundi has ruled since the start of the republic in 1966.
 the current Buha Kingdom in the Kigoma Region of Western Tanzania is led by a regional "mwami" from Manyovu, Elifas Robert.
Traditional kingdoms in the North Kivu, South Kivu, and Maniema provinces in the Democratic Republic of the Congo call their traditional leaders "mwami".
The Luhya people of Western Kenya refer to their supreme ruler as "Mwami".