Though "sultan" is usually 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 for the official separation underneath British auspices;[citation https://sultan66king00999.madmouseblog.com/12843275/new-step-by-step-map-for-sultan66king