Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | Ĭāpyx |
| Gen. | Iapygis |
| Dat. | Iapygi |
| Acc. | Iapygem |
| Abl. | Iapygi |
| Voc. | Ĭāpyx |
| PLURIEL |
| Nom. | Iapyges |
| Gen. | Iapygĭum |
| Dat. | Iapygĭbus |
| Acc. | Iapyges |
| Abl. | Iapygĭbus |
| Voc. | Iapyges |
| SINGULIER |
| Nom. | Ĭāpyx |
| Gen. | Iapygis |
| Dat. | Iapygi |
| Acc. | Iapygem |
| Abl. | Iapygi |
| Voc. | Ĭāpyx |
| PLURIEL |
| Nom. | Iapyges |
| Gen. | Iapygĭum |
| Dat. | Iapygĭbus |
| Acc. | Iapyges |
| Abl. | Iapygĭbus |
| Voc. | Iapyges |
| SINGULIER |
| Nom. | Ĭāpyx |
| Gen. | Iapygis |
| Dat. | Iapygi |
| Acc. | Ĭāpyx |
| Abl. | Iapygi |
| Voc. | Ĭāpyx |
| PLURIEL |
| Nom. | Iapygĭa |
| Gen. | Iapygĭum |
| Dat. | Iapygĭbus |
| Acc. | Iapygĭa |
| Abl. | Iapygĭbus | |