Okay, buddy. Have you ever heard the grown ups talking about somebody being a prince, or a duke, or a count? These are what we call hereditary titles. That means they are special names that people keep in their families, and they get passed down from generation to generation.
So, if you have a daddy who is a duke, there's a good chance that one day you will be a duke too! It's a bit like having a special family treasure that you get to keep forever, except instead of being a pretty necklace or a fancy vase, it's a special name that makes people show you lots of respect.
Now, you might be wondering why some people get these special names in the first place. Well, a long, long time ago, there were kings and queens who ruled over big countries. They needed people to help them run these countries, so they would pick some special folks and give them titles like duke or count or baron. Those people would help the king or queen keep things in order, and in return, they got to have fancy names that would make them important and respected.
Over time, those titles became just a fancy way of saying that somebody was from a really important family. So even if your family doesn't help the king or queen run things anymore, you might still get a special name passed down to you just because your great-great-great grandad was really helpful to the king way back when.
Does that make sense, little buddy?