Learned from the late Stuart Wilde that cynics used to be nicknamed the “dogmen” because they urinated openly in the public streets in front of people to show disdain, as a dog would do.
“The term “Cynic” comes directly from the ancient Greek word kynikos, which literally translates to “dog-like” or “of a dog” (derived from kyon, meaning “dog”).”
—Princeton University Press site.
I never liked Diogenes. I see him as a precursor to Rousseau and the “Noble Savage” stuff that is, in many ways, a bane of civilization.
Diogenes claimed that his father adulterated the coinage. I have seen coins of Sinope which have the first few letters of Diogenes' father's name (showing they were minted while he was in charge of the mint) and they are perfectly normal coins. So Diogenes may have just made that up.