Former Owner
- William H. Crain5
- William Hayley1
- William Heath Robinson1
- William Henry Stark1
- William Herbert2
- William Horatio Crawford1
- William IV1
- William King1
- William Lambarde1
- William Lymnor of Sharrington1
- William Noel-Hill, 3rd Baron Berwick1
- William Pownall1
- William Salloch163
- William Thynne1
- William Trench1
- William Tyssen-Amherst, 1st Baron Amherst of Hackney1
- William Wentworth-Fitzwilliam, 7th Earl Fitzwilliam1
- William Wix1
- William Wynham1
- Winifred A. Myers Autographs Ltd5