Okay kiddo, so lemme try to explain Leman Copley to you in a way that's easy to understand!
Leman Copley is actually two parts: Leman and Copley. Leman is a street in the city of London, England where lots of shipping and trade used to happen. Copley is the last name of a man who was born in Boston, Massachusetts in the United States back in 1737.
Now, what's important to know about Copley is that he became a very famous painter. He made lots of pictures that looked like real-life people and things. And Leman and Copley are combined to make a name that represents the kind of people who did a lot of business and trade in London during a time when Copley was still painting.
Basically, it's just a name that represents a specific place and time in history! Does that make sense, kiddo? Let me know if you have any questions!