Former Owner
- Godefroy Honore1
- Gotha Research Library1
- Guglielmo Libri Carucci dalla Sommaja1
- Hans P. Kraus1
- Harold Baillie Weaver1
- Harrison Horblit1
- Harrison Wright1
- Helge Frank1
- Henry Drury1
- Henry Ellis Allen1
- Henry Gee Barnard1
- Henry Harvey Frost1
- Henry Pateshall Bowden1
- Henry Pelham-Clinton, 7th Duke of Newcastle1
- Henry Probasco1
- Henry William Poor1
- Herschel V. Jones1
- Hieronymus Wilhelm Ebner von Eschenbach1
- Holmcultram Abbey1
- Holt family1