- Upanishads. Aitareyopaniṣad1
- Upanishads. Taittirīyopaniṣad1
- Upanishads. Īśopaniṣad1
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- Urdu language1
- Urjūzah fī al-ṭibb (Avicenna)1
- Urmawī, Sirāj al-Dīn Maḥmūd ibn Abī Bakr, 1198-12831
- Urology1
- Urraca, Infanta de Zamora, 1033?-11011
- Ushnuhī, ʻAbd al-ʻAzīz ibn ʻAlī, 12th cent. Kifāyah fī al-farāʼiḍ1
- Uther Pendragon (Legendary character)1
- Utraquists1
- Uzbakī, Muḥammad Murād, -1729. Silsilat al-dhahab1
- Uṇādisūtra1
- Valla, Lorenzo, 1407-14571
- Valle, Moses David ben Samuel, 1696-17771
- Varuṇa (Hindu deity)1
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- Vedas. Atharvaveda1
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