Former Owner
- Howard Gray1
- Howel Wills1
- Howell Wills1
- Hudson Gurney1
- Hugh Daubeney1
- Hugh Roberts1
- Huskan-ordi (Monastery in Muradiye, Turkey)1
- Huysburg1
- I. I. Middleton1
- Ida M. Havens1
- Imam Shamil1
- Ioannēs Grēgoropoulos1
- Irene Ludwig1
- Irvine Masson1
- Isabel de Bellusseau1
- Isabella d'Este1
- Ismāʻīl ibn al-Ḥājj ʻĪsá Jurayj al-Muhannā1
- Israel Gollancz1
- J. & J. Leighton1
- J. A. Dortmond1