He was a student of Manṣūr al-Kāshī who was the son of Mu`īn al-Dīn al-Kāsḥī (both possibly on the staff of the Samarqand observatory (823-53/1420-49) [Ragep, Tadhkira, 1:63]; Sayili, Observatory: 267; MAMS 2: 314-6; BEA [Kusuba]