Declension table of ?atna

Masculine	Singular	Dual	Plural
Nominative	atnaḥ	atnau	atnāḥ
Vocative	atna	atnau	atnāḥ
Accusative	atnam	atnau	atnān
Instrumental	atnena	atnābhyām	atnaiḥ atnebhiḥ
Dative	atnāya	atnābhyām	atnebhyaḥ
Ablative	atnāt	atnābhyām	atnebhyaḥ
Genitive	atnasya	atnayoḥ	atnānām
Locative	atne	atnayoḥ	atneṣu

Compound atna -

Adverb -atnam -atnāt