Declension table of ?prathamavāsya

Neuter	Singular	Dual	Plural
Nominative	prathamavāsyam	prathamavāsye	prathamavāsyāni
Vocative	prathamavāsya	prathamavāsye	prathamavāsyāni
Accusative	prathamavāsyam	prathamavāsye	prathamavāsyāni
Instrumental	prathamavāsyena	prathamavāsyābhyām	prathamavāsyaiḥ
Dative	prathamavāsyāya	prathamavāsyābhyām	prathamavāsyebhyaḥ
Ablative	prathamavāsyāt	prathamavāsyābhyām	prathamavāsyebhyaḥ
Genitive	prathamavāsyasya	prathamavāsyayoḥ	prathamavāsyānām
Locative	prathamavāsye	prathamavāsyayoḥ	prathamavāsyeṣu

Compound prathamavāsya -

Adverb -prathamavāsyam -prathamavāsyāt