Born on 718
Al-Khalil ibn Ahmad al-Farahidi was a writer and philologist from southern Arabia (modern day Oman) who compiled the first dictionary of the Arabic language, the Kitab al-Ayn.
Born on 1320 Died on 1380
Shams al-Dīn Abū ʿAbd Allāh Muḥammad ibn Muḥammad al-Khalīlī was a Syrian astronomer who compiled extensive tables for astronomical use. He worked for most of his life as a religious timekeeper (muwaqqit) at the Umayyad Mosque in Damascus.
Abu al-Fath Abd al-Rahman Mansour al-Khāzini was a Muslim astronomer of Greek ethnicity from Merv, then in the Khorasan province of Persia (located in today's Turkmenistan). Merv was known for its literary and scientific achievements.