Former Owner
- Thomas G. Bergin1
- Thomas Stonor, 3rd Baron Camoys1
- Thomas Thomson1
- Thomas de Grey, 2nd Earl de Grey1
- Ulrich Fugger1
- Vatican Library1
- Veit Engelhard Holtzschuher1
- Veit Georg Holtzschuher1
- Walter Ashburner1
- Walter Wehle Naumburg1
- Ward Murphey Canaday1
- Wilfred Merton1
- Wilfrid Voynich1
- William Babthorpe1
- William Betham1
- William Ewart Gladstone1
- William Gibbons Medlicott1
- William Maskell1
- William Morris1
- William Roscoe1