Abū al-Ḥasan ʿAlī ibn Muḥammad ibn Muḥammad ash-Shaybānī, better known as ʿAlī ʿIzz ad-Dīn Ibn al-Athīr al-Jazarī (Arabic: علي عز الدین بن الاثیر الجزري; 1160–1233) was a Hadith expert, historian, and biographer of Arab descent who wrote in Arabic and was from the Ibn Athir family. At the age of 21, he settled with his father in Mosul to continue his studies, devoting himself to the study of history and Islamic tradition. Source: Wikipedia (en)