Declension table of ?dvīpya

Masculine	Singular	Dual	Plural
Nominative	dvīpyaḥ	dvīpyau	dvīpyāḥ
Vocative	dvīpya	dvīpyau	dvīpyāḥ
Accusative	dvīpyam	dvīpyau	dvīpyān
Instrumental	dvīpyena	dvīpyābhyām	dvīpyaiḥ dvīpyebhiḥ
Dative	dvīpyāya	dvīpyābhyām	dvīpyebhyaḥ
Ablative	dvīpyāt	dvīpyābhyām	dvīpyebhyaḥ
Genitive	dvīpyasya	dvīpyayoḥ	dvīpyānām
Locative	dvīpye	dvīpyayoḥ	dvīpyeṣu

Compound dvīpya -

Adverb -dvīpyam -dvīpyāt