Declension table of ?ekaputra

Neuter	Singular	Dual	Plural
Nominative	ekaputram	ekaputre	ekaputrāṇi
Vocative	ekaputra	ekaputre	ekaputrāṇi
Accusative	ekaputram	ekaputre	ekaputrāṇi
Instrumental	ekaputreṇa	ekaputrābhyām	ekaputraiḥ
Dative	ekaputrāya	ekaputrābhyām	ekaputrebhyaḥ
Ablative	ekaputrāt	ekaputrābhyām	ekaputrebhyaḥ
Genitive	ekaputrasya	ekaputrayoḥ	ekaputrāṇām
Locative	ekaputre	ekaputrayoḥ	ekaputreṣu

Compound ekaputra -

Adverb -ekaputram -ekaputrāt