Abu-Hayyan at-Tawhidí

ʿAlī ibn Muḥammad ibn ʿAbbās al-Baghdadi (923–1023) also known as Abū Ḥayyān al-Tawḥīdī was an Arab or Persian and one of the most influential intellectuals and thinkers of the 10th century. Yāqūt al-Ḥamawī described him as "the philosopher of litterateurs and the litterateur of philosophers." However, he was neglected and ignored by the historians of his era. This neglect continued until Yāqūt wrote his book Muʿjam al-Udabāʾ, which contained a biographical outline of at-Tawḥīdī, relying primarily on what al-Tawḥīdī had written about himself.