Declension table of ?dhātṛputra

Masculine	Singular	Dual	Plural
Nominative	dhātṛputraḥ	dhātṛputrau	dhātṛputrāḥ
Vocative	dhātṛputra	dhātṛputrau	dhātṛputrāḥ
Accusative	dhātṛputram	dhātṛputrau	dhātṛputrān
Instrumental	dhātṛputreṇa	dhātṛputrābhyām	dhātṛputraiḥ dhātṛputrebhiḥ
Dative	dhātṛputrāya	dhātṛputrābhyām	dhātṛputrebhyaḥ
Ablative	dhātṛputrāt	dhātṛputrābhyām	dhātṛputrebhyaḥ
Genitive	dhātṛputrasya	dhātṛputrayoḥ	dhātṛputrāṇām
Locative	dhātṛputre	dhātṛputrayoḥ	dhātṛputreṣu

Compound dhātṛputra -

Adverb -dhātṛputram -dhātṛputrāt