Jalaluddin Muhammad bin As'ad Kazeruni Siddiqi (1426–1502 in Kazerun), often referred to as Jalaluddin Davani, Jalal Al-Din Muhammad ibn Asad Al-Dawani, or Allamah Davani, was a leading philosopher, theologian, jurist and poet of 15th Century Iran. He spent most of his life in Kazerun and he had strong connections with the local Qara Qoyunlu, Aq Qoyunlu, Timurid and Ottoman rulers, accepting a number of important government positions from them. He wrote a number of works on theology, philosophy and law. He died shortly after the founding of the Safavid dynasty, but before Shah Isma'il I captured the province of Fars.
Davani began his studies with his father, who was a student of Mir Gorgani (d.1413), but moved to Shiraz while he was still young to study theology, philosophy, logic, fiqh and usul ul-fiqh under notable scholars such as Homām-al-Dīn Golbārī, Safiuddin Iji, Muhiyudin Muhammad Kushkenari Ansari (Himself a student of Ibn Hajar al-Asqalani, who was also a student of Gorgani). Davani was often in disagreement with his contemporary and fellow philosopher-theologian, Sadruddin Dashtaki, who frequently criticized the former's views and writings.
Davani was associated with the royal courts of his time. During his youth, Yusuf, the son of the Qara Qoyunlu Sultan Jahanshah, appointed him to the post of Sadr (religious supervisor). However, he quickly resigned and began teaching at Madrasah-e Begum. He wrote his Akhlaq-e Jalali (lit. 'majestic manners'), an ethical manual modeled on Nasiruddin Tusi's Akhlaq e-Nasiri, for the Aq Qoyunlu Ozun Hasan. His Arz Nameh was written for the latter's son, Khalil. Davani later accepted the position of chief judge for the province of Fars from Sultan Ya'qub. He wrote a discussion on Ali bin Muhammad Qoushchi's commentary on the famous Tajrid ul-Kalam by Nasiruddin Tusi for both the sons of Ozun Hasan. He did oppose Sultan Ya'qub's centralization policies towards the end of the latter's life, but remained on good terms with Sultan Rostam. As well as his strong connection to Shiraz's Turkmen rulers, he was also associated with the Timurid court of Abu Sa'id, dedicated a number of books on Ishraqi philosophy to Sultan Mahmud I of Gujarat and another text to the Ottoman Sultan, Beyazid II.