Declension table of ?tatṛṣvas

Masculine	Singular	Dual	Plural
Nominative	tatṛṣvān	tatṛṣvāṃsau	tatṛṣvāṃsaḥ
Vocative	tatṛṣvan	tatṛṣvāṃsau	tatṛṣvāṃsaḥ
Accusative	tatṛṣvāṃsam	tatṛṣvāṃsau	tatṛṣuṣaḥ
Instrumental	tatṛṣuṣā	tatṛṣvadbhyām	tatṛṣvadbhiḥ
Dative	tatṛṣuṣe	tatṛṣvadbhyām	tatṛṣvadbhyaḥ
Ablative	tatṛṣuṣaḥ	tatṛṣvadbhyām	tatṛṣvadbhyaḥ
Genitive	tatṛṣuṣaḥ	tatṛṣuṣoḥ	tatṛṣuṣām
Locative	tatṛṣuṣi	tatṛṣuṣoḥ	tatṛṣvatsu

Compound tatṛṣvat -

Adverb -tatṛṣvas