Former Owner
- Taqī ibn ʻAlī al-Qummī1
- Thomas Appleby1
- Thomas G. Bergin1
- Thomas Moore1
- Thomas Phillipps30
- Thomas Stonor, 3rd Baron Camoys1
- Thomas Syddell1
- Thomas Thomson1
- Thomon Simon Jones1
- Tommaso Compeggio1
- Tours Cathedral1
- Ulrich Fugger1
- Vatican Library1
- Veit Engelhard Holtzschuher1
- Veit Georg Holtzschuher1
- Vicente Riva Palacio1
- Victor A. Schwarz1
- Walter Ashburner1
- Walter Sneyd7
- Wilfrid Voynich4