Declension table of ?vasya

Masculine	Singular	Dual	Plural
Nominative	vasyaḥ	vasyau	vasyāḥ
Vocative	vasya	vasyau	vasyāḥ
Accusative	vasyam	vasyau	vasyān
Instrumental	vasyena	vasyābhyām	vasyaiḥ vasyebhiḥ
Dative	vasyāya	vasyābhyām	vasyebhyaḥ
Ablative	vasyāt	vasyābhyām	vasyebhyaḥ
Genitive	vasyasya	vasyayoḥ	vasyānām
Locative	vasye	vasyayoḥ	vasyeṣu

Compound vasya -

Adverb -vasyam -vasyāt