Declension table of ?yayu

Masculine	Singular	Dual	Plural
Nominative	yayuḥ	yayū	yayavaḥ
Vocative	yayo	yayū	yayavaḥ
Accusative	yayum	yayū	yayūn
Instrumental	yayunā	yayubhyām	yayubhiḥ
Dative	yayave	yayubhyām	yayubhyaḥ
Ablative	yayoḥ	yayubhyām	yayubhyaḥ
Genitive	yayoḥ	yayvoḥ	yayūnām
Locative	yayau	yayvoḥ	yayuṣu

Compound yayu -

Adverb -yayu