Declension table of ?yadanna

Neuter	Singular	Dual	Plural
Nominative	yadannam	yadanne	yadannāni
Vocative	yadanna	yadanne	yadannāni
Accusative	yadannam	yadanne	yadannāni
Instrumental	yadannena	yadannābhyām	yadannaiḥ
Dative	yadannāya	yadannābhyām	yadannebhyaḥ
Ablative	yadannāt	yadannābhyām	yadannebhyaḥ
Genitive	yadannasya	yadannayoḥ	yadannānām
Locative	yadanne	yadannayoḥ	yadanneṣu

Compound yadanna -

Adverb -yadannam -yadannāt