Length matters here. The UK doesn’t allow names longer than 100 characters. Sure, that sounds generous, but parents have tried mega-long names like: “Captain Fantastic Faster Than Superman Spiderman Batman Wolverine The Hulk And The Flash Combined”. Yes, that’s a real rejection.
Another parent tried to name their son “Brick” all by itself—and got rejected because it looked like a potential insult. Imagine being called “Brick” on the playground. It’s not criminal, but it’s definitely mean.
