Declension table of ?yathāgata

Masculine	Singular	Dual	Plural
Nominative	yathāgataḥ	yathāgatau	yathāgatāḥ
Vocative	yathāgata	yathāgatau	yathāgatāḥ
Accusative	yathāgatam	yathāgatau	yathāgatān
Instrumental	yathāgatena	yathāgatābhyām	yathāgataiḥ yathāgatebhiḥ
Dative	yathāgatāya	yathāgatābhyām	yathāgatebhyaḥ
Ablative	yathāgatāt	yathāgatābhyām	yathāgatebhyaḥ
Genitive	yathāgatasya	yathāgatayoḥ	yathāgatānām
Locative	yathāgate	yathāgatayoḥ	yathāgateṣu

Compound yathāgata -

Adverb -yathāgatam -yathāgatāt