Declension table of ?sindhuputra

Masculine	Singular	Dual	Plural
Nominative	sindhuputraḥ	sindhuputrau	sindhuputrāḥ
Vocative	sindhuputra	sindhuputrau	sindhuputrāḥ
Accusative	sindhuputram	sindhuputrau	sindhuputrān
Instrumental	sindhuputreṇa	sindhuputrābhyām	sindhuputraiḥ sindhuputrebhiḥ
Dative	sindhuputrāya	sindhuputrābhyām	sindhuputrebhyaḥ
Ablative	sindhuputrāt	sindhuputrābhyām	sindhuputrebhyaḥ
Genitive	sindhuputrasya	sindhuputrayoḥ	sindhuputrāṇām
Locative	sindhuputre	sindhuputrayoḥ	sindhuputreṣu

Compound sindhuputra -

Adverb -sindhuputram -sindhuputrāt