Abū Bakr al-Sijistānī, Muḥammad b. ʿUzayr (d. ca. 330/942), was an exegete, man of letters and the author of various works in the field of gharīb al-Qurʾān (the knowledge of rare or unfamiliar Qurʾānic terms). In some sources, such as the works of al-Dāraquṭnī (d. 385/995) and al-Khaṭīb al-Baghdādī, he is called Muḥammad b. ʿAzīz (Ibn Nuqṭa, 7/7). Most sources, however, call him ‘Muḥammad b. ʿUzayr’, although his name is sometimes recorded as Muḥammad b. ʿUzayr b. Aʿyun (Ibn Qāḍī Shuhba, 189), Muḥammad b. ʿUmar b. Aḥmad (Pertsch, no. 522; Voorhoeve, 260) or Muḥammad b. ʿUmar b. Aḥ…