Declension table of ?saupanthya

Masculine	Singular	Dual	Plural
Nominative	saupanthyaḥ	saupanthyau	saupanthyāḥ
Vocative	saupanthya	saupanthyau	saupanthyāḥ
Accusative	saupanthyam	saupanthyau	saupanthyān
Instrumental	saupanthyena	saupanthyābhyām	saupanthyaiḥ saupanthyebhiḥ
Dative	saupanthyāya	saupanthyābhyām	saupanthyebhyaḥ
Ablative	saupanthyāt	saupanthyābhyām	saupanthyebhyaḥ
Genitive	saupanthyasya	saupanthyayoḥ	saupanthyānām
Locative	saupanthye	saupanthyayoḥ	saupanthyeṣu

Compound saupanthya -

Adverb -saupanthyam -saupanthyāt