Declension table of ?yāvan

Masculine	Singular	Dual	Plural
Nominative	yāvā	yāvānau	yāvānaḥ
Vocative	yāvan	yāvānau	yāvānaḥ
Accusative	yāvānam	yāvānau	yāvnaḥ
Instrumental	yāvnā	yāvabhyām	yāvabhiḥ
Dative	yāvne	yāvabhyām	yāvabhyaḥ
Ablative	yāvnaḥ	yāvabhyām	yāvabhyaḥ
Genitive	yāvnaḥ	yāvnoḥ	yāvnām
Locative	yāvni yāvani	yāvnoḥ	yāvasu

Compound yāva -

Adverb -yāvam