Declension table of ?mahātyaya

Neuter	Singular	Dual	Plural
Nominative	mahātyayam	mahātyaye	mahātyayāni
Vocative	mahātyaya	mahātyaye	mahātyayāni
Accusative	mahātyayam	mahātyaye	mahātyayāni
Instrumental	mahātyayena	mahātyayābhyām	mahātyayaiḥ
Dative	mahātyayāya	mahātyayābhyām	mahātyayebhyaḥ
Ablative	mahātyayāt	mahātyayābhyām	mahātyayebhyaḥ
Genitive	mahātyayasya	mahātyayayoḥ	mahātyayānām
Locative	mahātyaye	mahātyayayoḥ	mahātyayeṣu

Compound mahātyaya -

Adverb -mahātyayam -mahātyayāt