Declension table of ?dhātavya

Masculine	Singular	Dual	Plural
Nominative	dhātavyaḥ	dhātavyau	dhātavyāḥ
Vocative	dhātavya	dhātavyau	dhātavyāḥ
Accusative	dhātavyam	dhātavyau	dhātavyān
Instrumental	dhātavyena	dhātavyābhyām	dhātavyaiḥ dhātavyebhiḥ
Dative	dhātavyāya	dhātavyābhyām	dhātavyebhyaḥ
Ablative	dhātavyāt	dhātavyābhyām	dhātavyebhyaḥ
Genitive	dhātavyasya	dhātavyayoḥ	dhātavyānām
Locative	dhātavye	dhātavyayoḥ	dhātavyeṣu

Compound dhātavya -

Adverb -dhātavyam -dhātavyāt