Former Owner
- Henry Percy, 9th Earl of Northumberland1
- Henry Probasco1
- Henry St George1
- Henry William Poor1
- Henry Wyndham, 2nd Baron Leconfield1
- Herschel V. Jones1
- Hilel ben Asher Ḥananel Levi1
- Hiram Sibley1
- Hiram W. Woodward1
- Hudson Gurney1
- Huysburg1
- I. C.1
- Ibrahim Sultan1
- Ibrāhīm al-Shakūrī1
- Ibrāhīmʹzādah Ismāʻīl Z̲ihnī1
- Ilyās ibn Yūsuf Nāʻimat1
- Initials, P. S., on Illustration 1 and on p. 1. Note on Flyleaf: Gift of Tho Addi Sammet M.D. in 1906.1
- Institut für Orientalistik (Universität Wien)1
- Ioannes Morezenos1
- Iodocus Grebel1