Declension table of ?vidāyya

Neuter	Singular	Dual	Plural
Nominative	vidāyyam	vidāyye	vidāyyāni
Vocative	vidāyya	vidāyye	vidāyyāni
Accusative	vidāyyam	vidāyye	vidāyyāni
Instrumental	vidāyyena	vidāyyābhyām	vidāyyaiḥ
Dative	vidāyyāya	vidāyyābhyām	vidāyyebhyaḥ
Ablative	vidāyyāt	vidāyyābhyām	vidāyyebhyaḥ
Genitive	vidāyyasya	vidāyyayoḥ	vidāyyānām
Locative	vidāyye	vidāyyayoḥ	vidāyyeṣu

Compound vidāyya -

Adverb -vidāyyam -vidāyyāt