Declension table of ?yamadevatya

Neuter	Singular	Dual	Plural
Nominative	yamadevatyam	yamadevatye	yamadevatyāni
Vocative	yamadevatya	yamadevatye	yamadevatyāni
Accusative	yamadevatyam	yamadevatye	yamadevatyāni
Instrumental	yamadevatyena	yamadevatyābhyām	yamadevatyaiḥ
Dative	yamadevatyāya	yamadevatyābhyām	yamadevatyebhyaḥ
Ablative	yamadevatyāt	yamadevatyābhyām	yamadevatyebhyaḥ
Genitive	yamadevatyasya	yamadevatyayoḥ	yamadevatyānām
Locative	yamadevatye	yamadevatyayoḥ	yamadevatyeṣu

Compound yamadevatya -

Adverb -yamadevatyam -yamadevatyāt