Genealogies of the Nobles (Arabic: أنساب الأشراف; transliterated: Ansab al-Ashraf) is a book on the history and genealogy of Arabs, authored by Ahmad Ibn Yahya al-Baladhuri (d. 892 CE). The book includes stories about pre-Islamic Arabian kings, poets, and warriors, as well as the history of Rashidun, Umayyad, and Abbasid Caliphs. Source: Wikipedia (en)