Declension table of viṣṇu

Feminine	Singular	Dual	Plural
Nominative	viṣṇuḥ	viṣṇū	viṣṇavaḥ
Vocative	viṣṇo	viṣṇū	viṣṇavaḥ
Accusative	viṣṇum	viṣṇū	viṣṇūḥ
Instrumental	viṣṇvā	viṣṇubhyām	viṣṇubhiḥ
Dative	viṣṇvai viṣṇave	viṣṇubhyām	viṣṇubhyaḥ
Ablative	viṣṇvāḥ viṣṇoḥ	viṣṇubhyām	viṣṇubhyaḥ
Genitive	viṣṇvāḥ viṣṇoḥ	viṣṇvoḥ	viṣṇūnām
Locative	viṣṇvām viṣṇau	viṣṇvoḥ	viṣṇuṣu

Compound viṣṇu -

Adverb -viṣṇu