How to start a speech about surnames?

There is a child who is only three years old and can only speak words. When I first went to kindergarten, the teacher asked him, what's your name?

He said, get out.

The teacher said, how can you swear?

His father said, my name is fuck off.

Gungun is one of the surnames in China, which evolved from the blue surname and is now distributed in the minority areas in southwest China.