Declension table of ?ratnakara

Masculine	Singular	Dual	Plural
Nominative	ratnakaraḥ	ratnakarau	ratnakarāḥ
Vocative	ratnakara	ratnakarau	ratnakarāḥ
Accusative	ratnakaram	ratnakarau	ratnakarān
Instrumental	ratnakareṇa	ratnakarābhyām	ratnakaraiḥ ratnakarebhiḥ
Dative	ratnakarāya	ratnakarābhyām	ratnakarebhyaḥ
Ablative	ratnakarāt	ratnakarābhyām	ratnakarebhyaḥ
Genitive	ratnakarasya	ratnakarayoḥ	ratnakarāṇām
Locative	ratnakare	ratnakarayoḥ	ratnakareṣu

Compound ratnakara -

Adverb -ratnakaram -ratnakarāt