Maximus

From the Latin superlative adjective meaning greatest or largest, historically worn as a Roman cognomen. It spent centuries confined to antiquity before American parents discovered it in the late 1990s. The turn-of-the-millennium film industry did the heavy lifting to turn it into an everyday playground name.

The name suggests Roman armor and stadium seating, though the average bearer is twelve years old and carrying a middle-school backpack. It carries theatrical weight, sounding like a title first and a kid second. In everyday life, the three syllables almost immediately surrender to Max.