A generic person is the name for a type of person, not a real one. These names are often used to describe different kinds of people.
Jane and John Doe
The Does have been around since the 1300s and are still going strong. British lawyers used the most common first names of the time—John and Jane—whenever a person's true identity was unknown, when a person wished to remain anonymous, or when the person could be almost anyone. You can find these names today on legal documents, death certificates, and hospital records.
Mr. and Mrs. Buttinski
This couple is always minding other people's business. They interrupt conversation rudely and offer opinions whether or not they are wanted. Mr. and Mrs. Buttinski are not well liked.
Mr. and Mrs. Jones
Whatever you have, the Joneses always have more. They are the envy of their neighbors, who compete with them but can never quite “keep up.”
Mr. and Mrs. X
People like to gossip about this couple, although they are nothing special. In fact, like their neighbors the Does, they are the perfect example of an average couple. Compared to the other generic couples, Mr. and Mrs. X are rather plain.
Joe is one of the many nicknames used when one man greets another. Mac, Jack, Bud, and Buster are others. However, Joe is the most popular, and he has many different personalities.
The Average Joe
These Joes all represent your everyday man-in-the-street: Average Joe, Joe Blow, Joe Bunker, Joe Schmo.
Some Joes aren't just ordinary guys.