| Singular | Dual | Plural | |
| Nominative |
कठाकुः
kaṭhākuḥ |
कठाकू
kaṭhākū |
कठाकवः
kaṭhākavaḥ |
| Vocative |
कठाको
kaṭhāko |
कठाकू
kaṭhākū |
कठाकवः
kaṭhākavaḥ |
| Accusative |
कठाकुम्
kaṭhākum |
कठाकू
kaṭhākū |
कठाकून्
kaṭhākūn |
| Instrumental |
कठाकुना
kaṭhākunā |
कठाकुभ्याम्
kaṭhākubhyām |
कठाकुभिः
kaṭhākubhiḥ |
| Dative |
कठाकवे
kaṭhākave |
कठाकुभ्याम्
kaṭhākubhyām |
कठाकुभ्यः
kaṭhākubhyaḥ |
| Ablative |
कठाकोः
kaṭhākoḥ |
कठाकुभ्याम्
kaṭhākubhyām |
कठाकुभ्यः
kaṭhākubhyaḥ |
| Genitive |
कठाकोः
kaṭhākoḥ |
कठाक्वोः
kaṭhākvoḥ |
कठाकूनाम्
kaṭhākūnām |
| Locative |
कठाकौ
kaṭhākau |
कठाक्वोः
kaṭhākvoḥ |
कठाकुषु
kaṭhākuṣu |