Former Owner
- Horace de Landau2
- House of Bentivoglio1
- House of Colonna2
- House of Sforza1
- Hubert Palmer Greville1
- Hucks Gibbs, 1st Baron Aldenham1
- Hugo Philipp Waldbott-Bassenheim3
- Hákon Snæbjörnson1
- I. I. Middleton1
- I. I. Zur-Mühlen1
- Ignatius Molitor1
- Imre De Vegh11
- Ioannis Gennadios1
- Ioannēs Grēgoropoulos1
- Isaac Hollister Hall1
- Isaac ha-Rofe ben Moses ibn Elezar1
- Isabel d'Oyembrugge de Duras1
- Isabel de Bellusseau1
- Isabella d'Este1
- J. A. J. Barclay1