WHAT DOES SULTAN KING MEAN?

Sultanate of Zanzibar: two incumbents (in the Omani dynasty) Because the de facto separation from Oman in 1806, the final assumed the title Sultan in 1861 on the official separation less than British auspices;[citation necessary] since 1964 union with Tanganyika (Component of Tanzania)The territories ruled by a Sultan may very well be termed sultan