Declension table of ?tvaṅkya

Masculine	Singular	Dual	Plural
Nominative	tvaṅkyaḥ	tvaṅkyau	tvaṅkyāḥ
Vocative	tvaṅkya	tvaṅkyau	tvaṅkyāḥ
Accusative	tvaṅkyam	tvaṅkyau	tvaṅkyān
Instrumental	tvaṅkyena	tvaṅkyābhyām	tvaṅkyaiḥ tvaṅkyebhiḥ
Dative	tvaṅkyāya	tvaṅkyābhyām	tvaṅkyebhyaḥ
Ablative	tvaṅkyāt	tvaṅkyābhyām	tvaṅkyebhyaḥ
Genitive	tvaṅkyasya	tvaṅkyayoḥ	tvaṅkyānām
Locative	tvaṅkye	tvaṅkyayoḥ	tvaṅkyeṣu

Compound tvaṅkya -

Adverb -tvaṅkyam -tvaṅkyāt