Declension table of ?viśvaṅkara

Neuter	Singular	Dual	Plural
Nominative	viśvaṅkaram	viśvaṅkare	viśvaṅkarāṇi
Vocative	viśvaṅkara	viśvaṅkare	viśvaṅkarāṇi
Accusative	viśvaṅkaram	viśvaṅkare	viśvaṅkarāṇi
Instrumental	viśvaṅkareṇa	viśvaṅkarābhyām	viśvaṅkaraiḥ
Dative	viśvaṅkarāya	viśvaṅkarābhyām	viśvaṅkarebhyaḥ
Ablative	viśvaṅkarāt	viśvaṅkarābhyām	viśvaṅkarebhyaḥ
Genitive	viśvaṅkarasya	viśvaṅkarayoḥ	viśvaṅkarāṇām
Locative	viśvaṅkare	viśvaṅkarayoḥ	viśvaṅkareṣu

Compound viśvaṅkara -

Adverb -viśvaṅkaram -viśvaṅkarāt