| Synonym | Reference | Specificity |
| Iroquois family | Exact | |
| Iroquois proteins | Exact | |
| homeodomain iroquois proteins | Exact | |
| Iroquois-class homeodomain proteins | Exact |
| Identifier | Name | Relation |
| HGNC:14359 | IRX2 | isa |
| HGNC:14361 | IRX5 | isa |
| HGNC:14358 | IRX1 | isa |
| HGNC:14360 | IRX3 | isa |
| HGNC:23729 | MKX | isa |
| HGNC:6129 | IRX4 | isa |
| HGNC:14675 | IRX6 | isa |