- Gage, Thomas Gage,--1st viscount--Bookplate1
- Giustiniani, Leonardo, approximately 1388-1446.1
- Gregory IX, Pope, ca. 1170-1241.1
- Griffolini, Francesco, 1418-1483.1
- Guldinbeck, Bartholomaeus, active 1475-1488, printer1
- Hermannus de Scildis, ca.1290-1357. Speculum manuale sacerdotum.1
- Heyslein, Eriffinus--Autograph.1
- Hugo, Harold--Bookplate.1
- Hypsicles, of Alexandria1
- John,--the Baptist, Saint--Poetry.1
- Kartause Marienburg (Weddern, Germany) Inscription.1
- Kloss, Georg Franz Burkhard,--1787-1854--Bookplate.1
- Kloster Kaisheim Inscription (1977 +189)1
- Klosterkirche Lambach Ownership.1
- Königliche Bibliothek zu Berlin Stamp (v. 2)1
- Machlinia, William de, active 1481-1486, printer.1
- Manuzio, Aldo, 1449 or 1450-1515, printer1
- Maritnus,--Saint, bishop of Tours,--316?-397?1
- Marston, Thomas E.--Bookplate.1
- Martini, Giuseppe, 1870-1944--Autograph1