Former Owner
- Girard Dupeireux1
- Gladbach Abbey1
- Gotha Research Library1
- Guglielmo Libri Carucci dalla Sommaja3
- H. P. Kraus (firm)8
- Harrison Horblit1
- Harrison Wright4
- Henricus Lafferde1
- Henricus Mewe1
- Henry Huth3
- Henry White1
- Howard Lehman Goodhart2
- Hugo Philipp Waldbott-Bassenheim3
- I. I. Zur-Mühlen1
- Ignatius Molitor1
- Imre De Vegh3
- Irene Ludwig1
- J. C. Inglis1
- J. E. Schulte1
- Jacob Suter1