Declension table of mahādeva

Masculine	Singular	Dual	Plural
Nominative	mahādevaḥ	mahādevau	mahādevāḥ
Vocative	mahādeva	mahādevau	mahādevāḥ
Accusative	mahādevam	mahādevau	mahādevān
Instrumental	mahādevena	mahādevābhyām	mahādevaiḥ mahādevebhiḥ
Dative	mahādevāya	mahādevābhyām	mahādevebhyaḥ
Ablative	mahādevāt	mahādevābhyām	mahādevebhyaḥ
Genitive	mahādevasya	mahādevayoḥ	mahādevānām
Locative	mahādeve	mahādevayoḥ	mahādeveṣu

Compound mahādeva -

Adverb -mahādevam -mahādevāt