Abū al-Fatḥ Ḥusaynī (d. 976/1568), was an Imāmī theologian and jurist, and the son of Mīr Makhdūm ʿArabshāhī Qazwīnī. He was probably also known as Abū al-Fatḥ Sharqa, ostensibly because his lineage could be traced back to the sayyids of al-sharq (the east) (Rūmlū, 443; Afandī, 5/487, 492).

Abū al-Fatḥ was educated in Transoxania under the tutelage of ʿIṣām al-Dīn al-Isfarāyinī (d. 943/1536) (Rūmlū, 443; Qummī, 1/561), and later spent some time teaching in Mashhad. Subsequently, because of a…