Former Owner
- Gordon A. Block Junior2
- Gordon Adamson1
- Gotha Research Library1
- Grabhorn Press1
- Great St. Martin Church1
- Grenville Kane2
- Griffon's Medieval Manuscripts, Inc.1
- Grigorij Sergeevič Stroganov1
- Grolier Club1
- Guglielmo Libri Carucci dalla Sommaja19
- Guilberto Broulin1
- Guilelmus Laing1
- Guillemette Bezard1
- Guillemme Broullin1
- Gundulf1
- Gustav Wolf1
- Gusztáv Emich1
- H. Charles Barnston1
- H. P. Kraus (firm)25
- H. Richard Archer1