Declension table of ?protha

Masculine	Singular	Dual	Plural
Nominative	prothaḥ	prothau	prothāḥ
Vocative	protha	prothau	prothāḥ
Accusative	protham	prothau	prothān
Instrumental	prothena	prothābhyām	prothaiḥ prothebhiḥ
Dative	prothāya	prothābhyām	prothebhyaḥ
Ablative	prothāt	prothābhyām	prothebhyaḥ
Genitive	prothasya	prothayoḥ	prothānām
Locative	prothe	prothayoḥ	protheṣu

Compound protha -

Adverb -protham -prothāt