Declension table of ?pūrvaya

Masculine	Singular	Dual	Plural
Nominative	pūrvayaḥ	pūrvayau	pūrvayāḥ
Vocative	pūrvaya	pūrvayau	pūrvayāḥ
Accusative	pūrvayam	pūrvayau	pūrvayān
Instrumental	pūrvayeṇa	pūrvayābhyām	pūrvayaiḥ pūrvayebhiḥ
Dative	pūrvayāya	pūrvayābhyām	pūrvayebhyaḥ
Ablative	pūrvayāt	pūrvayābhyām	pūrvayebhyaḥ
Genitive	pūrvayasya	pūrvayayoḥ	pūrvayāṇām
Locative	pūrvaye	pūrvayayoḥ	pūrvayeṣu

Compound pūrvaya -

Adverb -pūrvayam -pūrvayāt