What does "diogenes" mean?

Diogenes: A Greek Cynic philosopher (412-323 B. C.) who lived much in Athens and was distinguished for contempt of the common aims and conditions of life, and for sharp, caustic sayings. Diogenes' crab (Zoöl.), a species of terrestrial hermit crabs (Cenobita Diogenes), abundant in the West Indies and often destructive to crops. -- Diogenes' tub, the tub which the philosopher Diogenes is said to have carried about with him as his house, in which he lived.