Declension table of ?jāsya

Neuter	Singular	Dual	Plural
Nominative	jāsyam	jāsye	jāsyāni
Vocative	jāsya	jāsye	jāsyāni
Accusative	jāsyam	jāsye	jāsyāni
Instrumental	jāsyena	jāsyābhyām	jāsyaiḥ
Dative	jāsyāya	jāsyābhyām	jāsyebhyaḥ
Ablative	jāsyāt	jāsyābhyām	jāsyebhyaḥ
Genitive	jāsyasya	jāsyayoḥ	jāsyānām
Locative	jāsye	jāsyayoḥ	jāsyeṣu

Compound jāsya -

Adverb -jāsyam -jāsyāt