Declension table of ?tavya

Neuter	Singular	Dual	Plural
Nominative	tavyam	tavye	tavyāni
Vocative	tavya	tavye	tavyāni
Accusative	tavyam	tavye	tavyāni
Instrumental	tavyena	tavyābhyām	tavyaiḥ
Dative	tavyāya	tavyābhyām	tavyebhyaḥ
Ablative	tavyāt	tavyābhyām	tavyebhyaḥ
Genitive	tavyasya	tavyayoḥ	tavyānām
Locative	tavye	tavyayoḥ	tavyeṣu

Compound tavya -

Adverb -tavyam -tavyāt