Died on 1497
Abu Ishak Ibrahim ibn Hilal al-Sijilmasi was a Moroccan legal scholar well known for his verdicts (fatwas). He is the author of al-Durr al-nathīr alá Ajwibat Abī al-Hasan al-Saghīr, Hādhihi ajwibat al-Imām ibn Hilāl and a commentary on Misbah al-arwah fi usul al falah.
Died on 1085
Ibrahim ibn Said Al-Wazzân is known to have been a prominent instrument maker working in Valencia and Toledo. For more detail click here.
Born on 908 Died on 946
Ibrahim ibn Sinan was an Islamic mathematician and astronomer who studied geometry and in particular tangents to circles. He also made advances in the theory of integration.