Abū Yūsuf Yaʻqūb ibn ʼIsḥāq aṣ-Ṣabbāḥ al-Kindī was a Mesopotamian Arab polymath who was active as a philosopher, mathematician, physician, and music theorist. Al-Kindi was the first of the Islamic peripatetic philosophers, and is hailed as the "father of Arab philosophy". 796 – 870; died at about 74. Alive at the same time as Charlemagne, Muḥammad ibn Musa al-Khwarizmi, Abu Nuwas, Al-Shafi'i, and Alfred the Great. Wiki link