Declension table of sumitra

Masculine	Singular	Dual	Plural
Nominative	sumitraḥ	sumitrau	sumitrāḥ
Vocative	sumitra	sumitrau	sumitrāḥ
Accusative	sumitram	sumitrau	sumitrān
Instrumental	sumitreṇa	sumitrābhyām	sumitraiḥ sumitrebhiḥ
Dative	sumitrāya	sumitrābhyām	sumitrebhyaḥ
Ablative	sumitrāt	sumitrābhyām	sumitrebhyaḥ
Genitive	sumitrasya	sumitrayoḥ	sumitrāṇām
Locative	sumitre	sumitrayoḥ	sumitreṣu

Compound sumitra -

Adverb -sumitram -sumitrāt