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- Al-Khalili (1320, Damascus, Syria - 1380, Damascus, Syria) an astronomer who compiled extensive tables for astronomical use
- Khalil ibn Ahmad (c. 718, Oman – c. 791) writer and philologist, compiled the first dictionary of the Arabic language, the Kitab al-Ayn
- Al-Kindi (c. 801, Kufa, Iraq – 873, Bahgdad, Iraq) Arab philosopher, mathematician, astronomer, physician and geographer
- Ibn Khaldun (May 27, 1332, Tunis - March 19, 1406, Cairo, Egypt)
Read more about this topic: List Of Arab Scientists And Scholars