Declension table of ?viṣṇudvīpa

Masculine	Singular	Dual	Plural
Nominative	viṣṇudvīpaḥ	viṣṇudvīpau	viṣṇudvīpāḥ
Vocative	viṣṇudvīpa	viṣṇudvīpau	viṣṇudvīpāḥ
Accusative	viṣṇudvīpam	viṣṇudvīpau	viṣṇudvīpān
Instrumental	viṣṇudvīpena	viṣṇudvīpābhyām	viṣṇudvīpaiḥ viṣṇudvīpebhiḥ
Dative	viṣṇudvīpāya	viṣṇudvīpābhyām	viṣṇudvīpebhyaḥ
Ablative	viṣṇudvīpāt	viṣṇudvīpābhyām	viṣṇudvīpebhyaḥ
Genitive	viṣṇudvīpasya	viṣṇudvīpayoḥ	viṣṇudvīpānām
Locative	viṣṇudvīpe	viṣṇudvīpayoḥ	viṣṇudvīpeṣu

Compound viṣṇudvīpa -

Adverb -viṣṇudvīpam -viṣṇudvīpāt