Declension table of ?prathamarātra

Masculine	Singular	Dual	Plural
Nominative	prathamarātraḥ	prathamarātrau	prathamarātrāḥ
Vocative	prathamarātra	prathamarātrau	prathamarātrāḥ
Accusative	prathamarātram	prathamarātrau	prathamarātrān
Instrumental	prathamarātreṇa	prathamarātrābhyām	prathamarātraiḥ prathamarātrebhiḥ
Dative	prathamarātrāya	prathamarātrābhyām	prathamarātrebhyaḥ
Ablative	prathamarātrāt	prathamarātrābhyām	prathamarātrebhyaḥ
Genitive	prathamarātrasya	prathamarātrayoḥ	prathamarātrāṇām
Locative	prathamarātre	prathamarātrayoḥ	prathamarātreṣu

Compound prathamarātra -

Adverb -prathamarātram -prathamarātrāt