Declension table of ?yāsya

Masculine	Singular	Dual	Plural
Nominative	yāsyaḥ	yāsyau	yāsyāḥ
Vocative	yāsya	yāsyau	yāsyāḥ
Accusative	yāsyam	yāsyau	yāsyān
Instrumental	yāsyena	yāsyābhyām	yāsyaiḥ yāsyebhiḥ
Dative	yāsyāya	yāsyābhyām	yāsyebhyaḥ
Ablative	yāsyāt	yāsyābhyām	yāsyebhyaḥ
Genitive	yāsyasya	yāsyayoḥ	yāsyānām
Locative	yāsye	yāsyayoḥ	yāsyeṣu

Compound yāsya -

Adverb -yāsyam -yāsyāt