Former Owner
- Giovanni Sforza1
- Girolamo Cardina1
- Girolamo d'Adda1
- Giulio Antonio Acquaviva1
- Giulio Saibante1
- Giuseppe Antonio Saccardini1
- Giuseppe Canonici1
- Giuseppe Franchini1
- Giusto Venier1
- Gladbach Abbey1
- Gladys Freeman1
- 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