The following names have already been used within the genus and therefore cannot be re-used. This list is not in strict alphabetical order but is sorted including spaces, full stops etc. in row order. To look at other names click on the appropriate first letter.
| Ida M. Britten | Ide's Double | Ignea | Ilka |
| Incana | Inchcolm | Inchcolme | Inchkeith |
| Incholm | Indian Maid | Indian Road Runner | Indian Rug |
| Indian Summer | Indian Thick Rug | Ineke | Ines |
| Ines Jacke | Inge | Ingrid | Ingrid Bouker |
| Ingrid Bouter | Inschriach Bronze | Inshriach Bronze | Iris van Leyen |
| Isabella | Islay Mist | Isle of Flotta | Isle of Hirta |
| Isobel Dickson | Isobel Frye | Isobel Hughes |
© The Heather Society, 1 March 2006