Borjigin

Borjigin is a word that describes a group of people who share the same family name. It's like if everyone in your family had the same last name, and you were all part of the "Smith" or "Jones" family. Borjigins are often associated with the Mongol Empire and Genghis Khan, who was a famous Borjigin.

Think of it like this: Imagine you are playing a game of pretend, like "house." You and some of your friends decide to pretend that you're all part of the same family. You might choose a family name, like "the Smiths." Whenever you play that game, you act like you are all related and have the same last name. Borjigin is like that, but it's a real group of people who are related and share the same name.