What is the origin of the idiom "anyone who is anyone" and when to use it?

The phrase is thought to have originated in the 19th century, when it was used to describe people who were considered to be the most important or influential members of society. It follows a common structure in the English language where "everybody" is used to refer to a collective group of people, and "who is anybody" adds emphasis to the idea that only those who hold importance or influence are included. Today, the phrase is still used to describe people who are well-known or respected in their field.