Declension table of ?kṛṣṇādhvan

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇādhvā	kṛṣṇādhvānau	kṛṣṇādhvānaḥ
Vocative	kṛṣṇādhvan	kṛṣṇādhvānau	kṛṣṇādhvānaḥ
Accusative	kṛṣṇādhvānam	kṛṣṇādhvānau	kṛṣṇādhvanaḥ
Instrumental	kṛṣṇādhvanā	kṛṣṇādhvabhyām	kṛṣṇādhvabhiḥ
Dative	kṛṣṇādhvane	kṛṣṇādhvabhyām	kṛṣṇādhvabhyaḥ
Ablative	kṛṣṇādhvanaḥ	kṛṣṇādhvabhyām	kṛṣṇādhvabhyaḥ
Genitive	kṛṣṇādhvanaḥ	kṛṣṇādhvanoḥ	kṛṣṇādhvanām
Locative	kṛṣṇādhvani	kṛṣṇādhvanoḥ	kṛṣṇādhvasu

Compound kṛṣṇādhva -

Adverb -kṛṣṇādhvam