Person name placeholder in your country/region/language [closed]

1. What is a common placeholder name?
2. What is the French version of John Doe?
3. What do they call John Doe in other countries?

What is a common placeholder name?

In the United States and Canada, John Doe and the variations Jane Doe (for females) and John Roe or Richard Roe (for a second party): used in legal action and cases when the true identity of a person is unknown or must be withheld for legal reasons.

What is the French version of John Doe?

Pierre-Paul-Jacques or Pierre-Jean-Jacques designates anyone and everyone at the same time, in the third person, in an informal context. The very common Jean Dupont is used the same way as John Doe is in English.

What do they call John Doe in other countries?

Sometimes we call them 'John Smith', and here we remember the famous explorer. Whatever we call them, it seems that every culture has its own version, each with its own peculiarities. Among other things, they're known as Juan Perez, N.N. or fulano de tal in the Spanish speaking world.