(Moroccan/Saharawi) Honorific title like 'Sir', always used to prefix saints' names

Sidi is a masculine title of respect in Western Arabic language and Egyptian Arabic (sayyid in other dialects) equivalent to modern popular usage of the English Mr.. It is also used in other Arabic dialects, such as Eastern Arabic, as well as by Muslims of the Indian subcontinent in the Urdu language - however, in these latter two cases, "Sidi" does not have so much currency as titles like sayed, janab or saheb.

proper form of address to a marabout