Declension table of ?pūrvapuruṣa

Masculine	Singular	Dual	Plural
Nominative	pūrvapuruṣaḥ	pūrvapuruṣau	pūrvapuruṣāḥ
Vocative	pūrvapuruṣa	pūrvapuruṣau	pūrvapuruṣāḥ
Accusative	pūrvapuruṣam	pūrvapuruṣau	pūrvapuruṣān
Instrumental	pūrvapuruṣeṇa	pūrvapuruṣābhyām	pūrvapuruṣaiḥ pūrvapuruṣebhiḥ
Dative	pūrvapuruṣāya	pūrvapuruṣābhyām	pūrvapuruṣebhyaḥ
Ablative	pūrvapuruṣāt	pūrvapuruṣābhyām	pūrvapuruṣebhyaḥ
Genitive	pūrvapuruṣasya	pūrvapuruṣayoḥ	pūrvapuruṣāṇām
Locative	pūrvapuruṣe	pūrvapuruṣayoḥ	pūrvapuruṣeṣu

Compound pūrvapuruṣa -

Adverb -pūrvapuruṣam -pūrvapuruṣāt