Former Owner
- Grabhorn Press1
- Griffon's Medieval Manuscripts, Inc.1
- Groenendael Priory1
- Grolier Club1
- Guilberto Broulin1
- Guilelmus Laing1
- Guillaume Budé1
- Guillemette Bezard1
- Gustav Wolf1
- Gusztáv Emich1
- Habert du Berry d'Artois family1
- Hamon Styleman Le Strange1
- Hans Albrecht von Derschau1
- Hans P. Kraus1
- Harold Baillie Weaver1
- Harold Drayton1
- Harris1
- Harrison Gray Otis1
- Harrison Wright1
- Harrold E. Gillingham1