Declension table of ?mattavat

Masculine	Singular	Dual	Plural
Nominative	mattavān	mattavantau	mattavantaḥ
Vocative	mattavan	mattavantau	mattavantaḥ
Accusative	mattavantam	mattavantau	mattavataḥ
Instrumental	mattavatā	mattavadbhyām	mattavadbhiḥ
Dative	mattavate	mattavadbhyām	mattavadbhyaḥ
Ablative	mattavataḥ	mattavadbhyām	mattavadbhyaḥ
Genitive	mattavataḥ	mattavatoḥ	mattavatām
Locative	mattavati	mattavatoḥ	mattavatsu

Compound mattavat -

Adverb -mattavantam