Declension table of ?dhanyatva

Neuter	Singular	Dual	Plural
Nominative	dhanyatvam	dhanyatve	dhanyatvāni
Vocative	dhanyatva	dhanyatve	dhanyatvāni
Accusative	dhanyatvam	dhanyatve	dhanyatvāni
Instrumental	dhanyatvena	dhanyatvābhyām	dhanyatvaiḥ
Dative	dhanyatvāya	dhanyatvābhyām	dhanyatvebhyaḥ
Ablative	dhanyatvāt	dhanyatvābhyām	dhanyatvebhyaḥ
Genitive	dhanyatvasya	dhanyatvayoḥ	dhanyatvānām
Locative	dhanyatve	dhanyatvayoḥ	dhanyatveṣu

Compound dhanyatva -

Adverb -dhanyatvam -dhanyatvāt