Suzy has an egghead, Tintin a quiff. Titeuf has both. Deriving his name from the egghead, petit oeuf was corrupted into Titeuf. But it is thanks to his proud, rebellious straw yellow crest that everyone immediately recognises him wherever he goes. It is not unlikely his behaviour has something to do with that as well. Look at the comic strip mural. Is Titeuf on a school trip to the globes of the Atomium in Brussels and checking in the convex mirror to see if his hair is alright? Or was it an attempt to spy on the girls from the air? With a cheeky show-off, you never know.