Former Owner
- Walter Thomas Wallace1
- Wasservas1
- Weiss & Co.1
- Wentworth Woodhouse1
- Wheldon & Wesley1
- William Augustus White1
- William Boyle Gourley1
- William Caxton1
- William Draper1
- William H. Robinson Ltd.1
- William Horatio Crawford1
- William King1
- William Loring Andrews1
- William N. Bullard1
- William Salloch1
- William Wentworth-Fitzwilliam, 7th Earl Fitzwilliam1
- Wolfgang G. Scholz1
- Zane, Hieronymus1
- Zanichelli, Mauro1
- Zuccaro, Nello, active 20th century1