Declension table of ?pūrvaya

Neuter	Singular	Dual	Plural
Nominative	pūrvayam	pūrvaye	pūrvayāṇi
Vocative	pūrvaya	pūrvaye	pūrvayāṇi
Accusative	pūrvayam	pūrvaye	pūrvayāṇi
Instrumental	pūrvayeṇa	pūrvayābhyām	pūrvayaiḥ
Dative	pūrvayāya	pūrvayābhyām	pūrvayebhyaḥ
Ablative	pūrvayāt	pūrvayābhyām	pūrvayebhyaḥ
Genitive	pūrvayasya	pūrvayayoḥ	pūrvayāṇām
Locative	pūrvaye	pūrvayayoḥ	pūrvayeṣu

Compound pūrvaya -

Adverb -pūrvayam -pūrvayāt