Former Owner
- George Herbert Palmer1
- George Venables-Vernon, 5th Baron Vernon1
- Georgius Ruch1
- Germanus Langen1
- Giacobbe Marcaria1
- Gladbach Abbey1
- Gotha Research Library1
- Guglielmo Libri Carucci dalla Sommaja1
- Harrison Horblit1
- Henry Huth1
- Henry White1
- I. I. Zur-Mühlen1
- Ignatius Molitor1
- J. E. Schulte1
- James Elwin Millard1
- James Russell Lowell1
- Johann Egolph1
- Johannes Wesbach1
- John Eliot Hodgkin1
- John Harvey Treat1