Declension table of ?mahānta

Masculine	Singular	Dual	Plural
Nominative	mahāntaḥ	mahāntau	mahāntāḥ
Vocative	mahānta	mahāntau	mahāntāḥ
Accusative	mahāntam	mahāntau	mahāntān
Instrumental	mahāntena	mahāntābhyām	mahāntaiḥ
Dative	mahāntāya	mahāntābhyām	mahāntebhyaḥ
Ablative	mahāntāt	mahāntābhyām	mahāntebhyaḥ
Genitive	mahāntasya	mahāntayoḥ	mahāntānām
Locative	mahānte	mahāntayoḥ	mahānteṣu

Compound mahānta -

Adverb -mahāntam -mahāntāt