Declension table of ?vaṃśavistara

Masculine	Singular	Dual	Plural
Nominative	vaṃśavistaraḥ	vaṃśavistarau	vaṃśavistarāḥ
Vocative	vaṃśavistara	vaṃśavistarau	vaṃśavistarāḥ
Accusative	vaṃśavistaram	vaṃśavistarau	vaṃśavistarān
Instrumental	vaṃśavistareṇa	vaṃśavistarābhyām	vaṃśavistaraiḥ vaṃśavistarebhiḥ
Dative	vaṃśavistarāya	vaṃśavistarābhyām	vaṃśavistarebhyaḥ
Ablative	vaṃśavistarāt	vaṃśavistarābhyām	vaṃśavistarebhyaḥ
Genitive	vaṃśavistarasya	vaṃśavistarayoḥ	vaṃśavistarāṇām
Locative	vaṃśavistare	vaṃśavistarayoḥ	vaṃśavistareṣu

Compound vaṃśavistara -

Adverb -vaṃśavistaram -vaṃśavistarāt