Caesar seems to have the double theme of clown and king, as:
Caesar was the title for the Roman emperors, derived from the cognomen of Julius Caesar.
Clown can be romanized both as Clown and Crown.
He is the self-proclaimed King of Shinokuni (Land of Death).
In his Shinokuni form, he obtains a crown.
Like Magellan, Caesar’s sinister face, wild hair and horns make him resemble a stereotypical image of a demon; particularly Baphomet, a pagan deity-turned-devil most commonly depicted as a humanoid goat.
In his first appearances his coat did not show “GAS” written twice on the front as it does from Chapter 666 on.
Caesar may be based in part off of the infamous Josef Mengele, a member of a team of doctors who conducted deadly and inhumane experiments on prisoners of Auschwitz in Nazi Germany. Mengele created a kindergarten and play area for his child test subjects and treated them far better than others in the camp, providing better food and living conditions. He gave the children sweets and referred to them kindly, yet was known for his sadistic tendencies and complete lack of empathy towards all test subjects.
He is, so far, the only Devil Fruit user who seems to keep his Logia Devil Fruit active all the time (while not bound by Seastone), giving him his gaseous appearance.
He shares with Indigo both the scientist profession, the clown theme (Caesar only in the name) and Voice actor.
In the 5th fan poll, Caesar ranked 37th, making him the most popular member of the Donquixote Family behind Doflamingo, and over ranking executive Sugar.
