Declension table of ?yu

Masculine	Singular	Dual	Plural
Nominative	yuḥ	yū	yavaḥ
Vocative	yo	yū	yavaḥ
Accusative	yum	yū	yūn
Instrumental	yunā	yubhyām	yubhiḥ
Dative	yave	yubhyām	yubhyaḥ
Ablative	yoḥ	yubhyām	yubhyaḥ
Genitive	yoḥ	yvoḥ	yūnām
Locative	yau	yvoḥ	yuṣu

Compound yu -

Adverb -yu