- Urmawī, Sirāj al-Dīn Maḥmūd ibn Abī Bakr, 1198-1283. Maṭāliʻ al-anwār1
- Ushnuhī, ʻAbd al-ʻAzīz ibn ʻAlī, 12th cent. Kifāyah fī al-farāʼiḍ1
- Waqf6
- Waraqāt (Imām al-Ḥaramayn al-Juwaynī, ʻAbd al-Malik ibn ʻAbd Allāh)3
- Watermarks18
- Weights and measures (Islamic law)1
- Wills (Islamic law)1
- Women--Religious aspects--Islam1
- Worship (Islam)1
- Yāsamīnīyah (Ibn al-Yāsamīn, ʻAbd Allāh ibn Ḥajjāj)1
- Zakat3
- Zaydīs2
- Zaydīyah1
- Zaydīyah--Doctrines1
- Zubad (Ibn Raslān al-Ramlī, Aḥmad ibn Ḥusayn)1
- Zubdat al-uṣūl (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Zād al-mustaqniʻ (Ḥujāwī, Mūsá ibn Aḥmad)1
- Zāhid, Aḥmad ibn Muḥammad, d. 1416. Hadīyat al-nāṣiḥ1
- autographs (manuscripts)4
- diagrams4