Declension table of ?prothamāna

Masculine	Singular	Dual	Plural
Nominative	prothamānaḥ	prothamānau	prothamānāḥ
Vocative	prothamāna	prothamānau	prothamānāḥ
Accusative	prothamānam	prothamānau	prothamānān
Instrumental	prothamānena	prothamānābhyām	prothamānaiḥ prothamānebhiḥ
Dative	prothamānāya	prothamānābhyām	prothamānebhyaḥ
Ablative	prothamānāt	prothamānābhyām	prothamānebhyaḥ
Genitive	prothamānasya	prothamānayoḥ	prothamānānām
Locative	prothamāne	prothamānayoḥ	prothamāneṣu

Compound prothamāna -

Adverb -prothamānam -prothamānāt