Declension table of ?dvaka

Masculine	Singular	Dual	Plural
Nominative	dvakaḥ	dvakau	dvakāḥ
Vocative	dvaka	dvakau	dvakāḥ
Accusative	dvakam	dvakau	dvakān
Instrumental	dvakena	dvakābhyām	dvakaiḥ dvakebhiḥ
Dative	dvakāya	dvakābhyām	dvakebhyaḥ
Ablative	dvakāt	dvakābhyām	dvakebhyaḥ
Genitive	dvakasya	dvakayoḥ	dvakānām
Locative	dvake	dvakayoḥ	dvakeṣu

Compound dvaka -

Adverb -dvakam -dvakāt