Okay, imagine that the United Kingdom is like a giant puzzle with lots of little pieces called counties. Each county has its own special name that comes from a very old language called Old English.
A long time ago, people who spoke Old English gave names to the counties based on things they saw there or the people who lived there. For example, a county called Yorkshire was named after people who lived there and a county called Shropshire was named after a type of tree called a "scrobb".
Over time, these county names have stayed the same even though the people who live there and the things they see have changed. So even though a county like Kent used to have kings and knights, it now has cities and farms. But the name still stays the same because it is part of the history and culture of the United Kingdom.
So when you look at a list of counties in the United Kingdom, each name is like a little piece of history that tells us about the people and things that were there a long time ago. And even though we might not know these things today, it's important to remember them so we can appreciate the stories of the past.