Declension table of ?yaupa

Neuter	Singular	Dual	Plural
Nominative	yaupam	yaupe	yaupāni
Vocative	yaupa	yaupe	yaupāni
Accusative	yaupam	yaupe	yaupāni
Instrumental	yaupena	yaupābhyām	yaupaiḥ
Dative	yaupāya	yaupābhyām	yaupebhyaḥ
Ablative	yaupāt	yaupābhyām	yaupebhyaḥ
Genitive	yaupasya	yaupayoḥ	yaupānām
Locative	yaupe	yaupayoḥ	yaupeṣu

Compound yaupa -

Adverb -yaupam -yaupāt