Declension table of ?sūmaya

Masculine	Singular	Dual	Plural
Nominative	sūmayaḥ	sūmayau	sūmayāḥ
Vocative	sūmaya	sūmayau	sūmayāḥ
Accusative	sūmayam	sūmayau	sūmayān
Instrumental	sūmayena	sūmayābhyām	sūmayaiḥ sūmayebhiḥ
Dative	sūmayāya	sūmayābhyām	sūmayebhyaḥ
Ablative	sūmayāt	sūmayābhyām	sūmayebhyaḥ
Genitive	sūmayasya	sūmayayoḥ	sūmayānām
Locative	sūmaye	sūmayayoḥ	sūmayeṣu

Compound sūmaya -

Adverb -sūmayam -sūmayāt