Declension table of ?śivadeva

Neuter	Singular	Dual	Plural
Nominative	śivadevam	śivadeve	śivadevāni
Vocative	śivadeva	śivadeve	śivadevāni
Accusative	śivadevam	śivadeve	śivadevāni
Instrumental	śivadevena	śivadevābhyām	śivadevaiḥ
Dative	śivadevāya	śivadevābhyām	śivadevebhyaḥ
Ablative	śivadevāt	śivadevābhyām	śivadevebhyaḥ
Genitive	śivadevasya	śivadevayoḥ	śivadevānām
Locative	śivadeve	śivadevayoḥ	śivadeveṣu

Compound śivadeva -

Adverb -śivadevam -śivadevāt