Former Owner
- Godefroy Honore1
- Goldman, Yosef2
- Gonthaut-Saint-Blanchard family1
- Goodspeed's Book Shop2
- Gordon A. Block Junior9
- Gordon Adamson1
- Gotha Research Library1
- Grabhorn Press1
- Great St. Martin Church1
- Grenville Kane3
- Griffon's Medieval Manuscripts, Inc.1
- Grigorij Sergeevič Stroganov1
- Groenendael Priory1
- Grolier Club1
- Grosvenor, Richard1
- Gudrun Wandel69
- Guglielmo Libri Carucci dalla Sommaja24
- Guilberto Broulin1
- Guilelmus Laing1
- Guilielmus van Hamme2