Declension table of ?tvaṣṭṛdevatya

Neuter	Singular	Dual	Plural
Nominative	tvaṣṭṛdevatyam	tvaṣṭṛdevatye	tvaṣṭṛdevatyāni
Vocative	tvaṣṭṛdevatya	tvaṣṭṛdevatye	tvaṣṭṛdevatyāni
Accusative	tvaṣṭṛdevatyam	tvaṣṭṛdevatye	tvaṣṭṛdevatyāni
Instrumental	tvaṣṭṛdevatyena	tvaṣṭṛdevatyābhyām	tvaṣṭṛdevatyaiḥ
Dative	tvaṣṭṛdevatyāya	tvaṣṭṛdevatyābhyām	tvaṣṭṛdevatyebhyaḥ
Ablative	tvaṣṭṛdevatyāt	tvaṣṭṛdevatyābhyām	tvaṣṭṛdevatyebhyaḥ
Genitive	tvaṣṭṛdevatyasya	tvaṣṭṛdevatyayoḥ	tvaṣṭṛdevatyānām
Locative	tvaṣṭṛdevatye	tvaṣṭṛdevatyayoḥ	tvaṣṭṛdevatyeṣu

Compound tvaṣṭṛdevatya -

Adverb -tvaṣṭṛdevatyam -tvaṣṭṛdevatyāt