Declension table of ?tadanna

Neuter	Singular	Dual	Plural
Nominative	tadannam	tadanne	tadannāni
Vocative	tadanna	tadanne	tadannāni
Accusative	tadannam	tadanne	tadannāni
Instrumental	tadannena	tadannābhyām	tadannaiḥ
Dative	tadannāya	tadannābhyām	tadannebhyaḥ
Ablative	tadannāt	tadannābhyām	tadannebhyaḥ
Genitive	tadannasya	tadannayoḥ	tadannānām
Locative	tadanne	tadannayoḥ	tadanneṣu

Compound tadanna -

Adverb -tadannam -tadannāt