Declension table of ?yaupya

Neuter	Singular	Dual	Plural
Nominative	yaupyam	yaupye	yaupyāni
Vocative	yaupya	yaupye	yaupyāni
Accusative	yaupyam	yaupye	yaupyāni
Instrumental	yaupyena	yaupyābhyām	yaupyaiḥ
Dative	yaupyāya	yaupyābhyām	yaupyebhyaḥ
Ablative	yaupyāt	yaupyābhyām	yaupyebhyaḥ
Genitive	yaupyasya	yaupyayoḥ	yaupyānām
Locative	yaupye	yaupyayoḥ	yaupyeṣu

Compound yaupya -

Adverb -yaupyam -yaupyāt