Declension table of ?yūthya

Neuter	Singular	Dual	Plural
Nominative	yūthyam	yūthye	yūthyāni
Vocative	yūthya	yūthye	yūthyāni
Accusative	yūthyam	yūthye	yūthyāni
Instrumental	yūthyena	yūthyābhyām	yūthyaiḥ
Dative	yūthyāya	yūthyābhyām	yūthyebhyaḥ
Ablative	yūthyāt	yūthyābhyām	yūthyebhyaḥ
Genitive	yūthyasya	yūthyayoḥ	yūthyānām
Locative	yūthye	yūthyayoḥ	yūthyeṣu

Compound yūthya -

Adverb -yūthyam -yūthyāt