Abū Isḥāq Ibrāhīm b. Yaḥyā l-Naqqāsh al-Tujībī (d. 493/1100), called Ibn al-Zarqālluh, was the most important western Islamic astronomer of the Middle Ages. He was known also as Walad al-Zarqiyāl (whence the Hispanicised form Azarquiel), al-Zarqālluh, al-Zarqāl, and Ibn Zarqāl. Al-Zarqālī (sometimes al-Zarqānī) and al-Zarqāla appear to be classicised Eastern forms. The name is occasionally written also as al-Zarqāllu and Zarqallu.
He was an instrument…
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“Ibn al-Zarqālluh”, in:
Encyclopaedia of Islam, THREE, Edited by: Kate Fleet, Gudrun Krämer, Denis Matringe, John Nawas, Everett Rowson.
Consulted online on 16 October 2018 <http://dx.doi.org/10.1163/1573-3912_ei3_COM_32310>