The name "Jamshid" is originally a compound of two parts, "Jam" and "shid", corresponding to the Avestan names "Yima" and "Xšaēta", "*Xšaitah" meant "bright, shining" or "radiant". The modern Turkish name "Cem" is derived from Persian "Jam". also the word Ajam is derived from the word Jam. acording to the book Documents on the Persian Gulf's name the Persian "jam" is the root of Arabic "Ajam", assuming that this Arabic word for the Persian-speaking population was derived from a Persian endonym, meaning the people of Jam. 