Declension table of ?svastya

Masculine	Singular	Dual	Plural
Nominative	svastyaḥ	svastyau	svastyāḥ
Vocative	svastya	svastyau	svastyāḥ
Accusative	svastyam	svastyau	svastyān
Instrumental	svastyena	svastyābhyām	svastyaiḥ svastyebhiḥ
Dative	svastyāya	svastyābhyām	svastyebhyaḥ
Ablative	svastyāt	svastyābhyām	svastyebhyaḥ
Genitive	svastyasya	svastyayoḥ	svastyānām
Locative	svastye	svastyayoḥ	svastyeṣu

Compound svastya -

Adverb -svastyam -svastyāt