Declension table of ?yamadvīpa

Masculine	Singular	Dual	Plural
Nominative	yamadvīpaḥ	yamadvīpau	yamadvīpāḥ
Vocative	yamadvīpa	yamadvīpau	yamadvīpāḥ
Accusative	yamadvīpam	yamadvīpau	yamadvīpān
Instrumental	yamadvīpena	yamadvīpābhyām	yamadvīpaiḥ yamadvīpebhiḥ
Dative	yamadvīpāya	yamadvīpābhyām	yamadvīpebhyaḥ
Ablative	yamadvīpāt	yamadvīpābhyām	yamadvīpebhyaḥ
Genitive	yamadvīpasya	yamadvīpayoḥ	yamadvīpānām
Locative	yamadvīpe	yamadvīpayoḥ	yamadvīpeṣu

Compound yamadvīpa -

Adverb -yamadvīpam -yamadvīpāt