Declension table of dvayasa

Masculine	Singular	Dual	Plural
Nominative	dvayasaḥ	dvayasau	dvayasāḥ
Vocative	dvayasa	dvayasau	dvayasāḥ
Accusative	dvayasam	dvayasau	dvayasān
Instrumental	dvayasena	dvayasābhyām	dvayasaiḥ dvayasebhiḥ
Dative	dvayasāya	dvayasābhyām	dvayasebhyaḥ
Ablative	dvayasāt	dvayasābhyām	dvayasebhyaḥ
Genitive	dvayasasya	dvayasayoḥ	dvayasānām
Locative	dvayase	dvayasayoḥ	dvayaseṣu

Compound dvayasa -

Adverb -dvayasam -dvayasāt