ELI5: Explain Like I'm 5

Ó Cianáin

Ó Cianáin is a last name used in Ireland. When you're born, your parents give you a name that you are called forever. But sometimes there are families that have a specific name that they call themselves so that people know they are all part of the same family. That name is called a last name or a surname.

So, let's say there's a family called the Ó Cianáin family. All the people in that family will have the last name Ó Cianáin. It's like they are all wearing the same kind of shirt, but instead of a shirt, they all have the same last name. Some people might just call them "the Cianáins" for short.

Sometimes, people might ask where you got your last name from. With the Ó Cianáin family, their last name comes from a long, long time ago when people didn't have last names like we do now. Instead, they would have a name that described something about them, like what they did for a job, or where they lived.

For the Ó Cianáin family, their last name comes from a man named Cianán. He lived a long time ago, and his family started using his name as their last name to show that they were related to him.

So that's the story of the Ó Cianáin family and how they got their last name.