Declension table of ?dhvānya

Masculine	Singular	Dual	Plural
Nominative	dhvānyaḥ	dhvānyau	dhvānyāḥ
Vocative	dhvānya	dhvānyau	dhvānyāḥ
Accusative	dhvānyam	dhvānyau	dhvānyān
Instrumental	dhvānyena	dhvānyābhyām	dhvānyaiḥ
Dative	dhvānyāya	dhvānyābhyām	dhvānyebhyaḥ
Ablative	dhvānyāt	dhvānyābhyām	dhvānyebhyaḥ
Genitive	dhvānyasya	dhvānyayoḥ	dhvānyānām
Locative	dhvānye	dhvānyayoḥ	dhvānyeṣu

Compound dhvānya -

Adverb -dhvānyam -dhvānyāt