The criminal alphabet – J?

A quick introduction of myself – I am a high school student from South Korea. So first off, excuse my poor English.

There is a joke that goes around in Korea. “믿거조” – which means like “the usual suspect – Mr. Jo(cho)”. When calling someone in Korea, you call them by their last name first.

This jokes went around because there were many people who have caused crimes or social scandals among people whose surname Jo(cho).

And I found something interesting, which is a list of common names of criminals in the United States. And I noticed that there are quite a lot of names that start with the letter J on the list, more frequently than the other letters.

We all know that this is just stupid generalization – but I started to think – how this even happened? Is there actually something with the names start with J? Lol