Declension table of ?tatāyvas

Neuter	Singular	Dual	Plural
Nominative	tatāyvat	tatāyuṣī	tatāyvāṃsi
Vocative	tatāyvat	tatāyuṣī	tatāyvāṃsi
Accusative	tatāyvat	tatāyuṣī	tatāyvāṃsi
Instrumental	tatāyuṣā	tatāyvadbhyām	tatāyvadbhiḥ
Dative	tatāyuṣe	tatāyvadbhyām	tatāyvadbhyaḥ
Ablative	tatāyuṣaḥ	tatāyvadbhyām	tatāyvadbhyaḥ
Genitive	tatāyuṣaḥ	tatāyuṣoḥ	tatāyuṣām
Locative	tatāyuṣi	tatāyuṣoḥ	tatāyvatsu

Compound tatāyvat -

Adverb -tatāyvat