Declension table of ?ṛcchamāna

Masculine	Singular	Dual	Plural
Nominative	ṛcchamānaḥ	ṛcchamānau	ṛcchamānāḥ
Vocative	ṛcchamāna	ṛcchamānau	ṛcchamānāḥ
Accusative	ṛcchamānam	ṛcchamānau	ṛcchamānān
Instrumental	ṛcchamānena	ṛcchamānābhyām	ṛcchamānaiḥ ṛcchamānebhiḥ
Dative	ṛcchamānāya	ṛcchamānābhyām	ṛcchamānebhyaḥ
Ablative	ṛcchamānāt	ṛcchamānābhyām	ṛcchamānebhyaḥ
Genitive	ṛcchamānasya	ṛcchamānayoḥ	ṛcchamānānām
Locative	ṛcchamāne	ṛcchamānayoḥ	ṛcchamāneṣu

Compound ṛcchamāna -

Adverb -ṛcchamānam -ṛcchamānāt