वृष्णीनां वासुदेवोऽस्मि पाण्डवानां धनंजयः। मुनीनामप्यहं व्यासः कवीनामुशना कविः ॥

vṛiṣhṇīnāṁ vāsudevo ’smi pāṇḍavānāṁ dhanañjayaḥ munīnām apyahaṁ vyāsaḥ kavīnām uśhanā kaviḥ

Of the Vṛishnis Vâsudeva am I; of the Pândavas Dhananjaya; of the Sages also I am Vyâsa; of poets Ushanâ the Bard.

In plain words: Krishna says among his own family clan, the Vrishnis, he is Vasudeva, meaning Krishna himself. Among the Pandava brothers he is Arjuna (Dhananjaya). Among wise men he is Vyasa, the great sage, and among poets he is Ushana, a famous wise poet.