The Wombat File Is Yours to Keep

First: the unguessed answer last week? Mustard.

On to a quick brain-disabler before the evening meets the day:

It's possible that the name of this city, the second-largest in its nation after the capital, comes from an ethnic group that settled in the region and was listed in the imperial records of Darius I, as well as in a major religious text. But it's also possible that it comes from the name of a famous and sometimes deified personage who was born thousands of miles away; in recent years, a temple to this figure has been discovered within the city's Old Citadel. What is the name of the city?

First correct answer to comments wins a papier-mache model of the band Sloan playing their Dylan-esque "Down in the Basement", which the Wombat may witness them playing tonight, in a concert that will also be attended by frequent quiz-dominator Scraps and less-frequent quiz-player (but no less dominating for all that) Velma. No Googling or playing "Delivering Maybes" backward in the hopes of finding backwards-masked answers (they're in there, but you have to speak Nova Scotian to understand what Patrick Pentland is saying). One guess per comment, put for the love of all deified personages, comment.

UPDATE 6/22: I initially left out a crucial preposition in the question, since added. Oops.