Declension table of ?ṛṣideva

Masculine	Singular	Dual	Plural
Nominative	ṛṣidevaḥ	ṛṣidevau	ṛṣidevāḥ
Vocative	ṛṣideva	ṛṣidevau	ṛṣidevāḥ
Accusative	ṛṣidevam	ṛṣidevau	ṛṣidevān
Instrumental	ṛṣidevena	ṛṣidevābhyām	ṛṣidevaiḥ ṛṣidevebhiḥ
Dative	ṛṣidevāya	ṛṣidevābhyām	ṛṣidevebhyaḥ
Ablative	ṛṣidevāt	ṛṣidevābhyām	ṛṣidevebhyaḥ
Genitive	ṛṣidevasya	ṛṣidevayoḥ	ṛṣidevānām
Locative	ṛṣideve	ṛṣidevayoḥ	ṛṣideveṣu

Compound ṛṣideva -

Adverb -ṛṣidevam -ṛṣidevāt