Declension table of ?astyāna

Neuter	Singular	Dual	Plural
Nominative	astyānam	astyāne	astyānāni
Vocative	astyāna	astyāne	astyānāni
Accusative	astyānam	astyāne	astyānāni
Instrumental	astyānena	astyānābhyām	astyānaiḥ
Dative	astyānāya	astyānābhyām	astyānebhyaḥ
Ablative	astyānāt	astyānābhyām	astyānebhyaḥ
Genitive	astyānasya	astyānayoḥ	astyānānām
Locative	astyāne	astyānayoḥ	astyāneṣu

Compound astyāna -

Adverb -astyānam -astyānāt