The city began to be known as "Peshāwar" by the era of Emperor Akbar. The current name is said by some to have been based upon the Persian for "frontier town" or, more literally, "forward city," though transcription errors and linguistic shifts may account for the city's new name. One theory suggests that the city's name is derived from the Persian name "Pesh Awardan", meaning "place of first arrival" or "frontier city," as Peshawar was the first city in the Indian subcontinent after crossing the Khyber Pass. Akbar's bibliographer, Abu'l-Fazl ibn Mubarak, lists the city's name as both "Parashāwar", transcribed in Persian as "پَرَشَاوَر", and "Peshāwar" ("پشاور").