When "sultan" is commonly used in Islamic contexts, the individual ruler's adherence to Islam may perhaps differ. Sultanate of Zanzibar: two incumbents (within the Omani dynasty) since the de facto separation from Oman in 1806, the final assumed the title Sultan in 1861 in the formal separation below British auspices;[citation https://sultan6601000.like-blogs.com/32740294/new-step-by-step-map-for-sultan66king