Declension table of ?tatvaṅgvas

Masculine	Singular	Dual	Plural
Nominative	tatvaṅgvān	tatvaṅgvāṃsau	tatvaṅgvāṃsaḥ
Vocative	tatvaṅgvan	tatvaṅgvāṃsau	tatvaṅgvāṃsaḥ
Accusative	tatvaṅgvāṃsam	tatvaṅgvāṃsau	tatvaṅguṣaḥ
Instrumental	tatvaṅguṣā	tatvaṅgvadbhyām	tatvaṅgvadbhiḥ
Dative	tatvaṅguṣe	tatvaṅgvadbhyām	tatvaṅgvadbhyaḥ
Ablative	tatvaṅguṣaḥ	tatvaṅgvadbhyām	tatvaṅgvadbhyaḥ
Genitive	tatvaṅguṣaḥ	tatvaṅguṣoḥ	tatvaṅguṣām
Locative	tatvaṅguṣi	tatvaṅguṣoḥ	tatvaṅgvatsu

Compound tatvaṅgvat -

Adverb -tatvaṅgvas