Former Owner
- Gotha Research Library1
- Grabhorn Press1
- Great St. Martin Church1
- Griffon's Medieval Manuscripts, Inc.1
- Grigorij Sergeevič Stroganov1
- Grolier Club1
- Guilberto Broulin1
- Guilelmus Laing1
- Guillemette Bezard1
- Gundulf1
- Gustav Wolf1
- Gusztáv Emich1
- H. Charles Barnston1
- H., C1
- Habert du Berry d'Artois family1
- Hamilton Cole1
- Hans Albrecht von Derschau1
- Harold Drayton1
- Harris1
- Harrison Wright1