The story
- Persian · borrowed fromمهتر“prince, chief, elder, great personage”
- English todaymehtar
From Persian مهتر (“prince, chief, elder, great personage”). Regarding the sense of a scavenger, Yule & Burnell (see References) state that the term was "applied to the class in question in irony, or rather in consolation".
Etymology from Wiktionary, CC BY-SA 4.0.