Declension table of ?kṛṣṇaśīrṣan

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇaśīrṣā	kṛṣṇaśīrṣāṇau	kṛṣṇaśīrṣāṇaḥ
Vocative	kṛṣṇaśīrṣan	kṛṣṇaśīrṣāṇau	kṛṣṇaśīrṣāṇaḥ
Accusative	kṛṣṇaśīrṣāṇam	kṛṣṇaśīrṣāṇau	kṛṣṇaśīrṣṇaḥ
Instrumental	kṛṣṇaśīrṣṇā	kṛṣṇaśīrṣabhyām	kṛṣṇaśīrṣabhiḥ
Dative	kṛṣṇaśīrṣṇe	kṛṣṇaśīrṣabhyām	kṛṣṇaśīrṣabhyaḥ
Ablative	kṛṣṇaśīrṣṇaḥ	kṛṣṇaśīrṣabhyām	kṛṣṇaśīrṣabhyaḥ
Genitive	kṛṣṇaśīrṣṇaḥ	kṛṣṇaśīrṣṇoḥ	kṛṣṇaśīrṣṇām
Locative	kṛṣṇaśīrṣṇi kṛṣṇaśīrṣaṇi	kṛṣṇaśīrṣṇoḥ	kṛṣṇaśīrṣasu

Compound kṛṣṇaśīrṣa -

Adverb -kṛṣṇaśīrṣam