- Turkic Mongol Domination (Armenia : 1045-1522)1
- Turkish language1
- Ugo, Giacoma di1
- Ugo, Piero di1
- Ugolino, Lodovico di1
- Ulric, Saint, Bishop of Augsburg, 890-9731
- Umidis, Jacomo di Pietro de1
- Underscoring1
- United States1
- Urmawī, Sirāj al-Dīn Maḥmūd ibn Abī Bakr, 1198-1283. Maṭāliʻ al-anwār1
- Urology1
- Ushnuhī, ʻAbd al-ʻAzīz ibn ʻAlī, 12th cent. Kifāyah fī al-farāʼiḍ1
- Ustarūshanī, Muḥammad ibn Maḥmūd, -1234 or 1235. Fuṣūl1
- Usury1
- Utopias1
- Valguarnera family1
- Valla, Lorenzo, 1407-14571
- Vanne, Benedetto di1
- Vannello, Giovanni di1
- Vannoli, Nanne1