Declension table of ?śvastya

Masculine	Singular	Dual	Plural
Nominative	śvastyaḥ	śvastyau	śvastyāḥ
Vocative	śvastya	śvastyau	śvastyāḥ
Accusative	śvastyam	śvastyau	śvastyān
Instrumental	śvastyena	śvastyābhyām	śvastyaiḥ śvastyebhiḥ
Dative	śvastyāya	śvastyābhyām	śvastyebhyaḥ
Ablative	śvastyāt	śvastyābhyām	śvastyebhyaḥ
Genitive	śvastyasya	śvastyayoḥ	śvastyānām
Locative	śvastye	śvastyayoḥ	śvastyeṣu

Compound śvastya -

Adverb -śvastyam -śvastyāt