Cesar and his nephew Ugolín are two of the three main antagonists (along with Adil Hoxha) in The Simpsons episode The Crepes of Wrath.
Cesar is voiced by Dan Castellaneta and Ugolín is voiced by Harry Shearer.
They are two abusive French wine makers that live with their donkey Maurice in an old house next to the vineyard they work at. When Once Bart arrives in France after being sent there for three months in an exchange program upon playing a prank at school that wound up involving Skinner's mother, Ugolín picks him up at the airport and drives him to their place, called the Chateau Maison, where he and his uncle Cesar take Bart's belongings -giving his red hat to Maurice-, and then force him to work for them collecting grapes and making wine for the rest of his staying in France. They also fed him poorly and made him sleep on the ground.
After making Bart try some wine with anti-freeze and making sure he wasn't blinded by it, they sent him to the city in the middle of the rain to buy some more. While looking for the address, Bart meets a police officer and asks him for help, but unfortunately the cop doesn't understand english. As Bart walks away grumbling in frustration, he realizes he can speak french, so he goes back and tells the policeman about his exploiters and their methods, and Cesar and Ugolín are finally put in jail while Bart is hailed as a hero and enjoys a happy last month in France.
They are seen later on the series a couple of times, watching TV in an apartment and plundering a store during a blackout.
They have appeared again in the Season 27 episode, To Courier with Love.
- They seem named after César Soubeyran, "Le Papet" and his nephew Ugolin, the antagonists of the french novels Jean de Florette and Manon des Sources, by Marcel Pagnol, though they share very few characteristics with the novels' characters.