Declension table of ?mahāgaya

Neuter	Singular	Dual	Plural
Nominative	mahāgayam	mahāgaye	mahāgayāni
Vocative	mahāgaya	mahāgaye	mahāgayāni
Accusative	mahāgayam	mahāgaye	mahāgayāni
Instrumental	mahāgayena	mahāgayābhyām	mahāgayaiḥ
Dative	mahāgayāya	mahāgayābhyām	mahāgayebhyaḥ
Ablative	mahāgayāt	mahāgayābhyām	mahāgayebhyaḥ
Genitive	mahāgayasya	mahāgayayoḥ	mahāgayānām
Locative	mahāgaye	mahāgayayoḥ	mahāgayeṣu

Compound mahāgaya -

Adverb -mahāgayam -mahāgayāt