Former Owner
- Sorabji Framji Madan1
- Stanley Slotkin1
- Süleyman Çelebi1
- Taqī ibn ʻAlī al-Qummī1
- Thomas Corser1
- Thomas Grenville1
- Turner Macan1
- Typographic Library and Museum1
- Walter Ambrose Heath Harding1
- Wilfred Merton1
- William Constable1
- William Hayley1
- William J. Shaw1
- William Keeney Bixby1
- William Lambarde1
- William Taylor Scheide1
- William Thynne1
- William Tyssen-Amherst, 1st Baron Amherst of Hackney1
- Wolfgang Sigismund, Graf von Gallenberg1
- Yūsuf ibn Shaykh Muḥammad Jamālī1