I was looking for information about Draco Malfoy when I found this:

"Slytherin rival of Harry, Ron, and Hermione.

"Draco" means "dragon" in Latin. Also, Draco was the name of a cruel Athenian lawmaker. His harsh legal code punished both trivial and serious crimes with death. From this we get our expression "draconian laws", meaning unnecessarily harsh laws.

According to JKR, "Malfoy" is old French for "bad faith"."

I think that is interesting.