Declension table of ?dviśavas

Masculine	Singular	Dual	Plural
Nominative	dviśavān	dviśavāṃsau	dviśavāṃsaḥ
Vocative	dviśavan	dviśavāṃsau	dviśavāṃsaḥ
Accusative	dviśavāṃsam	dviśavāṃsau	dviśoṣaḥ
Instrumental	dviśoṣā	dviśavadbhyām	dviśavadbhiḥ
Dative	dviśoṣe	dviśavadbhyām	dviśavadbhyaḥ
Ablative	dviśoṣaḥ	dviśavadbhyām	dviśavadbhyaḥ
Genitive	dviśoṣaḥ	dviśoṣoḥ	dviśoṣām
Locative	dviśoṣi	dviśoṣoḥ	dviśavatsu

Compound dviśavat -

Adverb -dviśavas