Declension table of ?yuvāyu

Masculine	Singular	Dual	Plural
Nominative	yuvāyuḥ	yuvāyū	yuvāyavaḥ
Vocative	yuvāyo	yuvāyū	yuvāyavaḥ
Accusative	yuvāyum	yuvāyū	yuvāyūn
Instrumental	yuvāyunā	yuvāyubhyām	yuvāyubhiḥ
Dative	yuvāyave	yuvāyubhyām	yuvāyubhyaḥ
Ablative	yuvāyoḥ	yuvāyubhyām	yuvāyubhyaḥ
Genitive	yuvāyoḥ	yuvāyvoḥ	yuvāyūnām
Locative	yuvāyau	yuvāyvoḥ	yuvāyuṣu

Compound yuvāyu -

Adverb -yuvāyu