Declension table of ?pupurvas

Masculine	Singular	Dual	Plural
Nominative	pupurvān	pupurvāṃsau	pupurvāṃsaḥ
Vocative	pupurvan	pupurvāṃsau	pupurvāṃsaḥ
Accusative	pupurvāṃsam	pupurvāṃsau	pupuruṣaḥ
Instrumental	pupuruṣā	pupurvadbhyām	pupurvadbhiḥ
Dative	pupuruṣe	pupurvadbhyām	pupurvadbhyaḥ
Ablative	pupuruṣaḥ	pupurvadbhyām	pupurvadbhyaḥ
Genitive	pupuruṣaḥ	pupuruṣoḥ	pupuruṣām
Locative	pupuruṣi	pupuruṣoḥ	pupurvatsu

Compound pupurvat -

Adverb -pupurvas