Declension table of ?yathāpūrvaka

Masculine	Singular	Dual	Plural
Nominative	yathāpūrvakaḥ	yathāpūrvakau	yathāpūrvakāḥ
Vocative	yathāpūrvaka	yathāpūrvakau	yathāpūrvakāḥ
Accusative	yathāpūrvakam	yathāpūrvakau	yathāpūrvakān
Instrumental	yathāpūrvakeṇa	yathāpūrvakābhyām	yathāpūrvakaiḥ yathāpūrvakebhiḥ
Dative	yathāpūrvakāya	yathāpūrvakābhyām	yathāpūrvakebhyaḥ
Ablative	yathāpūrvakāt	yathāpūrvakābhyām	yathāpūrvakebhyaḥ
Genitive	yathāpūrvakasya	yathāpūrvakayoḥ	yathāpūrvakāṇām
Locative	yathāpūrvake	yathāpūrvakayoḥ	yathāpūrvakeṣu

Compound yathāpūrvaka -

Adverb -yathāpūrvakam -yathāpūrvakāt