Nisba could indicate he is an indigo merchant. Or al-Nīl could be a place in Iraq (Stern, "Ramisht")
How to cite this record:
Alan Elbaum and Pratima Gopalakrishnan, "Abu l-Ḥasan b. Masʿūd al-Nīlī," available online through the Princeton Geniza Project at https://geniza.princeton.edu/people/abu-l-hasan-b-mas-ud/, accessed July 22, 2026.