Former Owner
- That Guy with the Books1
- Thomas Bateman1
- Thomas Gage1
- Thomas Johnes1
- Thomas Windus1
- Thomas de Grey, 2nd Earl de Grey1
- Vittorio Forti1
- W. F. Olis1
- W. J. Gilbert1
- Walter Paul Havens1
- Walter Wehle Naumburg1
- Ward Murphey Canaday1
- Wilfrid Voynich1
- William Augustus White1
- William Bateman1
- William Betham1
- William Boyle Gourley1
- William Burdett-Coutts1
- William Carew Hazlitt1
- William Cecil, 1st Baron Burghley1