Declension table of ?ṛṣvavīra

Masculine	Singular	Dual	Plural
Nominative	ṛṣvavīraḥ	ṛṣvavīrau	ṛṣvavīrāḥ
Vocative	ṛṣvavīra	ṛṣvavīrau	ṛṣvavīrāḥ
Accusative	ṛṣvavīram	ṛṣvavīrau	ṛṣvavīrān
Instrumental	ṛṣvavīreṇa	ṛṣvavīrābhyām	ṛṣvavīraiḥ ṛṣvavīrebhiḥ
Dative	ṛṣvavīrāya	ṛṣvavīrābhyām	ṛṣvavīrebhyaḥ
Ablative	ṛṣvavīrāt	ṛṣvavīrābhyām	ṛṣvavīrebhyaḥ
Genitive	ṛṣvavīrasya	ṛṣvavīrayoḥ	ṛṣvavīrāṇām
Locative	ṛṣvavīre	ṛṣvavīrayoḥ	ṛṣvavīreṣu

Compound ṛṣvavīra -

Adverb -ṛṣvavīram -ṛṣvavīrāt