Who is "John Smith" in your country?
In English-speaking countries, the name "John Smith" is often used as a placeholder name because it's boring and common: John is one of the most common first names among English-speaking men, and...
In English-speaking countries, the name "John Smith" is often used as a placeholder name because it's boring and common: John is one of the most common first names among English-speaking men, and Smith is the most common surname/family name among English-descended people. Together, they make a very boring and bland name.
What's the equivalent in your country? What's the most boring, common name? What do people use as a placeholder when they need to use a name that isn't a real person but looks like it could be a real person?