Declension table of ?vayāvat

Masculine	Singular	Dual	Plural
Nominative	vayāvān	vayāvantau	vayāvantaḥ
Vocative	vayāvan	vayāvantau	vayāvantaḥ
Accusative	vayāvantam	vayāvantau	vayāvataḥ
Instrumental	vayāvatā	vayāvadbhyām	vayāvadbhiḥ
Dative	vayāvate	vayāvadbhyām	vayāvadbhyaḥ
Ablative	vayāvataḥ	vayāvadbhyām	vayāvadbhyaḥ
Genitive	vayāvataḥ	vayāvatoḥ	vayāvatām
Locative	vayāvati	vayāvatoḥ	vayāvatsu

Compound vayāvat -

Adverb -vayāvantam