Former Owner
- Godefroy Honore1
- Gonthaut-Saint-Blanchard family1
- Gotha Research Library1
- Grabhorn Press1
- Great St. Martin Church1
- Grenville Kane1
- Griffon's Medieval Manuscripts, Inc.1
- Grigorij Sergeevič Stroganov1
- Grolier Club1
- Gudrun Wandel1
- Guilelmus Laing1
- Guillaume Budé1
- Guillemette Bezard1
- Gundulf1
- Gustav Wolf1
- Gusztáv Emich1
- Gérard de Vaucouleurs1
- H. Bayle1
- H. Charles Barnston1
- H., C1