The early account of ‘Umar Khayyām published in Vol. V, Part III of the Bulletin contains a reference to his visiting a certain vizier, namely the Shihāb al-Islām “ ‘Abd al-Razzăq, son of the great jurisconsult Abu’l-Qāsim ‘Abdallāh ibn ‘Alī”. In the text as printed these names are followed by the words (trans., ibn Akh Naẓẓzām). But we should undoubtedly read instead either or “ nephew of the Niẓām [al-Mulk] ”, since from other sources we know exactly who this vizier was.

Notices of him are given by al-Bundārī (ed. Houtsma), 267, Ibn al-Athīr (Cairo ed.), x, 226, and Khwānd-amīr (published by Schefer, Siasset-Nameh, Supplément, 47), and a reference is made to him in the rāhat al-ṣūdur (Gibb Trust ed.), 167. He appears to have been called in full Abū’l-Maḥāsin ‘Abd al-Razzāq, the Shihāb al-Islām, though al-Bundārī gives his name as ‘Abd al-Dawwām and Khwānd-amīr as ‘Abd al-Rāziq, and the rāḥat al-ṣudūr gives his laqab as Shihāb al-Dīn.