When "sultan" is usually used in Islamic contexts, the individual ruler's adherence to Islam might fluctuate. Sultanate of Zanzibar: two incumbents (in the Omani dynasty) since the de facto separation from Oman in 1806, the last assumed the title Sultan in 1861 in the formal separation less than British auspices;[citation https://sultan6677765.mybjjblog.com/the-fact-about-sultan66king-that-no-one-is-suggesting-45362719