Declension table of ?siddhivighna

Masculine	Singular	Dual	Plural
Nominative	siddhivighnaḥ	siddhivighnau	siddhivighnāḥ
Vocative	siddhivighna	siddhivighnau	siddhivighnāḥ
Accusative	siddhivighnam	siddhivighnau	siddhivighnān
Instrumental	siddhivighnena	siddhivighnābhyām	siddhivighnaiḥ siddhivighnebhiḥ
Dative	siddhivighnāya	siddhivighnābhyām	siddhivighnebhyaḥ
Ablative	siddhivighnāt	siddhivighnābhyām	siddhivighnebhyaḥ
Genitive	siddhivighnasya	siddhivighnayoḥ	siddhivighnānām
Locative	siddhivighne	siddhivighnayoḥ	siddhivighneṣu

Compound siddhivighna -

Adverb -siddhivighnam -siddhivighnāt