Declension table of ?haṃsadvīpa

Masculine	Singular	Dual	Plural
Nominative	haṃsadvīpaḥ	haṃsadvīpau	haṃsadvīpāḥ
Vocative	haṃsadvīpa	haṃsadvīpau	haṃsadvīpāḥ
Accusative	haṃsadvīpam	haṃsadvīpau	haṃsadvīpān
Instrumental	haṃsadvīpena	haṃsadvīpābhyām	haṃsadvīpaiḥ haṃsadvīpebhiḥ
Dative	haṃsadvīpāya	haṃsadvīpābhyām	haṃsadvīpebhyaḥ
Ablative	haṃsadvīpāt	haṃsadvīpābhyām	haṃsadvīpebhyaḥ
Genitive	haṃsadvīpasya	haṃsadvīpayoḥ	haṃsadvīpānām
Locative	haṃsadvīpe	haṃsadvīpayoḥ	haṃsadvīpeṣu

Compound haṃsadvīpa -

Adverb -haṃsadvīpam -haṃsadvīpāt