Wisdom from the Early Cynics, Antisthenes 13

He used to converse in the gymnasium of Cynosarges (White Hound) at no great distance from the gates, and some think that the Cynic school derived its name from Cynosarges. 

Antisthenes himself too was nicknamed a hound pure and simple. 

And he was the first, Diocles tells us, to double his cloak and be content with that one garment and to take up a staff and a wallet. Neanthes too asserts that he was the first to double his mantle. Sosicrates, however, in the third book of his Successions of Philosophers says this was first done by Diodorus of Aspendus, who also let his beard grow and used a staff and a wallet.

—Diogenes Laërtius, 6.13