, Abū Bakr b. Masʿūd b. Aḥmad ʿAlāʾ al-Dīn Malik al-ʿUlamā, Ḥanafī jurist, also wrongly called al-Kās̲h̲ānī; his nisba is derived ¶ from Kāsān, “a place beyond al-S̲h̲ās̲h̲” (Ḳuras̲h̲ī, Ibn Duḳmāḳ), i. e. in Ferg̲h̲āna, north of the Saiḥūn; cf. Mustawfī, Nuzhat al- Ḳulūb, p. 246; Samʿānī, fol. 417r; Yāḳūt, iv. 227.
He was a pupil of ʿAlāʾ al-Dīn Muḥammad b. Aḥmad b. Abī Aḥmad al-Samarḳandī (d. 539 =1144) and married his daughter Fāṭima known as Faḳīha, giving his commentary on the Tuḥfa of his master as a bridal gift. He lived at first at the Sald̲j̲ūḳ court but was forced to…