Declension table of ?prathamasoma

Masculine	Singular	Dual	Plural
Nominative	prathamasomaḥ	prathamasomau	prathamasomāḥ
Vocative	prathamasoma	prathamasomau	prathamasomāḥ
Accusative	prathamasomam	prathamasomau	prathamasomān
Instrumental	prathamasomena	prathamasomābhyām	prathamasomaiḥ prathamasomebhiḥ
Dative	prathamasomāya	prathamasomābhyām	prathamasomebhyaḥ
Ablative	prathamasomāt	prathamasomābhyām	prathamasomebhyaḥ
Genitive	prathamasomasya	prathamasomayoḥ	prathamasomānām
Locative	prathamasome	prathamasomayoḥ	prathamasomeṣu

Compound prathamasoma -

Adverb -prathamasomam -prathamasomāt