What was Smurfs real name?

I'm curious, can you clarify for me what was the Smurfs' real name? Was it something that was consistently used throughout the franchise, or did it vary depending on the source material? I've always been fascinated by the backstory and origins of beloved characters like the Smurfs, and I'm eager to learn more about their identity beyond their iconic blue hue and mischievous nature. So, if you have any insight into their true moniker, I'd be thrilled to hear it!