Declension table of ?dvivrata

Masculine	Singular	Dual	Plural
Nominative	dvivrataḥ	dvivratau	dvivratāḥ
Vocative	dvivrata	dvivratau	dvivratāḥ
Accusative	dvivratam	dvivratau	dvivratān
Instrumental	dvivratena	dvivratābhyām	dvivrataiḥ dvivratebhiḥ
Dative	dvivratāya	dvivratābhyām	dvivratebhyaḥ
Ablative	dvivratāt	dvivratābhyām	dvivratebhyaḥ
Genitive	dvivratasya	dvivratayoḥ	dvivratānām
Locative	dvivrate	dvivratayoḥ	dvivrateṣu

Compound dvivrata -

Adverb -dvivratam -dvivratāt