| Ivory | John | Golden West Aerated Cordial Factory | Lindsay Street, Coolgardie | 1897 | Witton's Directory |
| Ivory Bros | | Wholesale & Retail Tobacconists & Hairdressers | Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Ivory Bros | | Hairdressers & Tobacconists | Ford Street, Coolgardie | 1897 | Witton's Directory |
| Ivoy | John | | York | 1897 | Witton's Directory |
| Ivoy | R. | | York | 1897 | Witton's Directory |
| Izard | W | - | Perth | 1878 | Herald Almanack |
| Izard | W. | - | Perth | 1879 | Herald Almanack |
| Izard | W. | - | Perth | 1879 | WA Almanack |
| Izard | W. | - | Perth | 1880 | Herald Almanack |
| Izard | W. | - | Perth | 1880 | WA Almanack |
| Izard | W. | - | Perth | 1881 | Herald Almanack |
| Izard | W. | - | Perth | 1881 | WA Almanack |
| Izard | W. | Billiard-Marker | Perth | 1882 | WA Almanack |
| Izard | W. | Billiard- Marker | Perth | 1884 | WA Almanack |
| Izard | W. | - | Perth | 1886 | WA Almanack |
| Izard | William | - | Perth | 1877 | WA Almanack |
| Izard | Wm. | - | Perth | 1884 | Herald Almanack |
| Izard | Wm. | - | Perth | 1885 | Herald Almanack |
| Izard & Witham | | Mining Agents | Toorak (suburb), Coolgardie | 1897 | Witton's Directory |
