Moulay
Linguistically Moulay comes from the Arabic mawlā/mawlāy but its use as a given name/title is a Maghrebi phenomenon; it is frequent in Amazigh-Arabic cultural settings such as Morocco.
Yes. Moulay was used as an honorific by Moroccan rulers and nobility (for example, the historical Sultan Moulay Isma'il). Its presence in royal titulature is well documented.
No. Moulay is not a Quranic proper name; it is derived from an Arabic word (mawlā) and later used regionally as a title and given name.
No. Moulay remains largely regional to the Maghreb and is rare or unfamiliar in many other Muslim-majority regions.
Moulay is traditionally used as a masculine honorific and given name and is categorized as Boy.