Declension table of ?arkaputra

Masculine	Singular	Dual	Plural
Nominative	arkaputraḥ	arkaputrau	arkaputrāḥ
Vocative	arkaputra	arkaputrau	arkaputrāḥ
Accusative	arkaputram	arkaputrau	arkaputrān
Instrumental	arkaputreṇa	arkaputrābhyām	arkaputraiḥ arkaputrebhiḥ
Dative	arkaputrāya	arkaputrābhyām	arkaputrebhyaḥ
Ablative	arkaputrāt	arkaputrābhyām	arkaputrebhyaḥ
Genitive	arkaputrasya	arkaputrayoḥ	arkaputrāṇām
Locative	arkaputre	arkaputrayoḥ	arkaputreṣu

Compound arkaputra -

Adverb -arkaputram -arkaputrāt