Declension table of ?upastheya

Masculine	Singular	Dual	Plural
Nominative	upastheyaḥ	upastheyau	upastheyāḥ
Vocative	upastheya	upastheyau	upastheyāḥ
Accusative	upastheyam	upastheyau	upastheyān
Instrumental	upastheyena	upastheyābhyām	upastheyaiḥ upastheyebhiḥ
Dative	upastheyāya	upastheyābhyām	upastheyebhyaḥ
Ablative	upastheyāt	upastheyābhyām	upastheyebhyaḥ
Genitive	upastheyasya	upastheyayoḥ	upastheyānām
Locative	upastheye	upastheyayoḥ	upastheyeṣu

Compound upastheya -

Adverb -upastheyam -upastheyāt