Abū 'Alī al-Fārisī (Arabic: الفارسى ابو على); surnamed Abū Alī al Ḥasan Aḥmad Abd al-Ghaffār Ibn Muḥammad ibn Sulaimān ibn Abān al-Fārisī (c. 901 – 987) ; was a leading grammarian of the school of al-Baṣrah of mixed Arab and Iranian heritage. He lived in Baghdād and later served at the courts of Sayf al-Dawla at Aleppo and 'Aḍud al-Dawlah at Shiraz. His nephew was Abi al-Hussein Muhammad Bin al-Hassan Bin Abd al-Wareth al-Faressi al-Nawawi, who instructed the celebrated theorist al-Jurjānī on al-Fārisī's grammatical treatise, the Idah.