Declension table of ?śaśnathvas

Masculine	Singular	Dual	Plural
Nominative	śaśnathvān	śaśnathvāṃsau	śaśnathvāṃsaḥ
Vocative	śaśnathvan	śaśnathvāṃsau	śaśnathvāṃsaḥ
Accusative	śaśnathvāṃsam	śaśnathvāṃsau	śaśnathuṣaḥ
Instrumental	śaśnathuṣā	śaśnathvadbhyām	śaśnathvadbhiḥ
Dative	śaśnathuṣe	śaśnathvadbhyām	śaśnathvadbhyaḥ
Ablative	śaśnathuṣaḥ	śaśnathvadbhyām	śaśnathvadbhyaḥ
Genitive	śaśnathuṣaḥ	śaśnathuṣoḥ	śaśnathuṣām
Locative	śaśnathuṣi	śaśnathuṣoḥ	śaśnathvatsu

Compound śaśnathvat -

Adverb -śaśnathvas