Abd al-Qahir al-Jurjani

Abū Bakr, ‘Abd al-Qāhir ibn ‘Abd ar-Raḥmān ibn Muḥammad al-Jurjānī (10091078 or 1081 AD [400 – 471 or 474 A.H.]); surnamed "Al-Nuhwī" (the grammarian), he was a renowned Persian grammarian of the Arabic language, literary theorist of the Muslim Shafi'i, and a follower of al-Ash'ari. He wrote several celebrated works on grammar and rhetoric, among these are "Mi,ut Ạmil" and "Al-Jumal" - introductions to Arabic syntax - and a commentary titled "Al-Mughnī" in three volumes.
Al-Jurjānī is said to have never left his native town of Gorgan, Iran, yet his reputation in the twin sciences of "ilm al balaghah" (eloquence and rhetorical art) and "ilm al bayan" (a branch of Arabic rhetoric dealing with metaphorical language), reached many Arabic scholars who travelled to see him. His two books on these subjects, "Asrār al-Balāghah" ("Secrets of Rhetoric"), and "Dalāʾīl al-ʿIjāz fi-l-Qurʾān" ("Arguments of the Miraculous Inimitability of the Quran") show influences of al-Jurjānī's predecessors, the grammarian Sibawayh, the critic Abi Helal al-'Askari al Balaghi, and the linguist and literary theorist Abu Ali al-Farisi, the author of "al-Idah" ("Elucidation").
Ali al-Farisi's nephew, Abi al-Hussein Muhammad ibn al-Hassan ibn Abd al-Wareth al-Faressi al-Nawawi, was al-Jurjānī's teacher, under whom he studied the "al-Idah", and on which he wrote a thirty-volume work of commentary entitled "al Maghna fi Sharh al-Idah" .