Declension table of ?mahavīrya

Masculine	Singular	Dual	Plural
Nominative	mahavīryaḥ	mahavīryau	mahavīryāḥ
Vocative	mahavīrya	mahavīryau	mahavīryāḥ
Accusative	mahavīryam	mahavīryau	mahavīryān
Instrumental	mahavīryeṇa	mahavīryābhyām	mahavīryaiḥ mahavīryebhiḥ
Dative	mahavīryāya	mahavīryābhyām	mahavīryebhyaḥ
Ablative	mahavīryāt	mahavīryābhyām	mahavīryebhyaḥ
Genitive	mahavīryasya	mahavīryayoḥ	mahavīryāṇām
Locative	mahavīrye	mahavīryayoḥ	mahavīryeṣu

Compound mahavīrya -

Adverb -mahavīryam -mahavīryāt