Al-Ištiqāq Kitāb Dida aš-šu‘ūbīya wa fī Yufasir Ištiqāq al-'Asmā' al-'Arabīati (الاشتقاق كتاب ضد الشعوبية وفيه يفسر اشتقاق الأسماء العربية) (Book of Etymology Against Shu'ubiyya and Arabic Name Etymologies Explained); abbr., Kitāb ul-Ištiqāq (الاشتقاق) (ed., Wüstenfeld, Göttingen, 1854):[22] Descriptions of etymological ties of Arabian tribal names and the earliest polemic against the "šu‘ūbīya" populist movement.[2][23][24]