Abu Mūsā Jābir ibn Hayyān (Arabic: جابر بن حیان, Persian: جابرحیان, often given the nisbahs al-al-Bariqi, al-Azdi, al-Kufi, al-Tusi or al-Sufi; fl. c. 721 – c. 815), also known as Geber, was a prominent polymath: a chemist and alchemist, astronomer and astrologer, engineer, geographer, philosopher, physicist, and pharmacist and physician. Born and educated in Tus, he later traveled to Kufa. He is sometimes referred to as the father of early chemistry.
As early as the 10th century, the identity and exact corpus of works of Jabir was in dispute in Islamic circles. His name was Latinized as "Geber" in the Christian West and in 13th-century Europe an anonymous writer, usually referred to as Pseudo-Geber, produced alchemical and metallurgical writings under the pen-name Geber.
In 988 Ibn al-Nadim compiled the Kitab al-Fihrist which mentions Jabir as a spiritual follower and as a companion to Jafar as-Sadiq, the sixth Shia Imam. In another reference al-Nadim reports that a group of philosophers claimed Jabir was one of their own members. Another group, reported by al-Nadim, says only The Large Book of Mercy is genuine and that the rest are pseudographical. Their assertions are rejected by al-Nadim. Joining al-Nadim in asserting a real Jabir; Ibn-Wahshiyya ("Jaber ibn Hayyn al-Sufi ...book on poison is a great work...") Rejecting a real Jabir; (the philosopher c. 970) Abu Sulayman al-Mantiqi claims the real author is one al-Hasan ibn al-Nakad al-Mawili. The 14th century critic of Arabic literature, Jamal al-Din ibn Nubata al-Misri declares all the writings attributed to Jabir doubtful.
Abū Marwān Ḥayyān ibn Khalaf ibn Ḥusayn ibn Ḥayyān al-Qurṭubī (987–1075), usually known as Ibn Hayyan, was a Muslim historian from Al-Andalus.
Born at Córdoba, he was an important official at the court of the Andalusian ruler al-Mansur and published several works on history which have only survived in part. His books constitute one of the most important sources for the study of the Andalusian history, especially the history of Córdoba and the kings of the taifas.
Like Ibn Hazm he defended the dynasty of the Umayyads and deplored its fall and the following dissolution of the Andalusian state and the coming of the taifas.
He died in Córdoba in 1075.
The following works are ascribed to Ibn Hayyan:
His best-known works are al-Muqtabis and al-Matin.