Former Owner
- T. Whitcombe Greene1
- T.L. Hartung1
- Theodore Newton Vail1
- Theodore Williams1
- Thomas Appleby1
- Thomas Mildmay1
- Thomas Richardson1
- Veṇīmādhava Puṇatāmakara1
- Walter Paul Havens1
- Wilfrid Voynich1
- William Bateman1
- William Bragge1
- William Burdett-Coutts1
- William Ely1
- William Gonstone1
- William Hargrave Dawson1
- William Loring Andrews1
- William Maskell1
- William S. Spaulding1
- William Taylor Scheide1