What is gatsby real name?

The character Jay Gatsby, from F. Scott Fitzgerald's novel "The Great Gatsby," does not have a real name that is explicitly mentioned in the story. Gatsby himself is a self-created persona, a mysterious and enigmatic millionaire figure who throws extravagant parties during the Jazz Age of the 1920s.

Before assuming the identity of Jay Gatsby, the character was born as James Gatz in North Dakota, to a poor farming family. He eventually transforms himself into Jay Gatsby and creates a new biography to distance himself from his humble origins. Gatsby's real name, James Gatz, is revealed towards the end of the book through the narration of Gatsby's father. However, throughout the story, Gatsby is only referred to by his chosen and adopted name, Jay Gatsby.