Declension table of ?śīvan

Masculine	Singular	Dual	Plural
Nominative	śīvā	śīvānau	śīvānaḥ
Vocative	śīvan	śīvānau	śīvānaḥ
Accusative	śīvānam	śīvānau	śīvnaḥ
Instrumental	śīvnā	śīvabhyām	śīvabhiḥ
Dative	śīvne	śīvabhyām	śīvabhyaḥ
Ablative	śīvnaḥ	śīvabhyām	śīvabhyaḥ
Genitive	śīvnaḥ	śīvnoḥ	śīvnām
Locative	śīvni śīvani	śīvnoḥ	śīvasu

Compound śīva -

Adverb -śīvam