Declension table of mahātmya

Masculine	Singular	Dual	Plural
Nominative	mahātmyaḥ	mahātmyau	mahātmyāḥ
Vocative	mahātmya	mahātmyau	mahātmyāḥ
Accusative	mahātmyam	mahātmyau	mahātmyān
Instrumental	mahātmyena	mahātmyābhyām	mahātmyaiḥ mahātmyebhiḥ
Dative	mahātmyāya	mahātmyābhyām	mahātmyebhyaḥ
Ablative	mahātmyāt	mahātmyābhyām	mahātmyebhyaḥ
Genitive	mahātmyasya	mahātmyayoḥ	mahātmyānām
Locative	mahātmye	mahātmyayoḥ	mahātmyeṣu

Compound mahātmya -

Adverb -mahātmyam -mahātmyāt