| Singular | Plural | |
|---|---|---|
| Nominativ | gymnasiarchus, gymnasiarchus | gymnasiarchi, gymnasiarchi |
| Genitiv | gymnasiarchi, gymnasiarchi | gymnasiarchorum, gymnasiarchorum, gymnasiarchum, gymnasiarchum |
| Dativ | gymnasiarcho, gymnasiarcho | gymnasiarchis, gymnasiarchis |
| Akkusativ | gymnasiarchom, gymnasiarchom, gymnasiarchum, gymnasiarchum | gymnasiarchos, gymnasiarchos |
| Ablativ | gymnasiarcho, gymnasiarcho | gymnasiarchis, gymnasiarchis |
| Vokativ | gymnasiarche, gymnasiarche | gymnasiarchi, gymnasiarchi |