Declension table of ?tastarvas

Masculine	Singular	Dual	Plural
Nominative	tastarvān	tastarvāṃsau	tastarvāṃsaḥ
Vocative	tastarvan	tastarvāṃsau	tastarvāṃsaḥ
Accusative	tastarvāṃsam	tastarvāṃsau	tastaruṣaḥ
Instrumental	tastaruṣā	tastarvadbhyām	tastarvadbhiḥ
Dative	tastaruṣe	tastarvadbhyām	tastarvadbhyaḥ
Ablative	tastaruṣaḥ	tastarvadbhyām	tastarvadbhyaḥ
Genitive	tastaruṣaḥ	tastaruṣoḥ	tastaruṣām
Locative	tastaruṣi	tastaruṣoḥ	tastarvatsu

Compound tastarvat -

Adverb -tastarvas