Why did Gatsby change his name?

Gatsby changes his name because he deliberately reinvents himself in order to escape his poor origins and become the kind of man he believes can achieve wealth, status, and Daisy’s love.

He is born James Gatz, the son of poor farmers in North Dakota, but as a teenager he imagines a completely different life for himself—one in which he is glamorous, successful, and important. That imagined identity comes first, and the name “Jay Gatsby” follows as part of making it real. He “sprang from his Platonic conception of himself,” meaning he creates an ideal version of who he wants to be and then commits to living as that person. Changing his name is the clearest outward sign of that transformation.

This reinvention is also practical. Gatsby knows that wealth alone isn’t enough—he needs to seem like he belongs among the elite. By abandoning “James Gatz,” a name tied to poverty and obscurity, he crafts a new identity that sounds refined and mysterious, helping him pass as someone worthy of Daisy, who comes from “old money.” Earlier in his life, he even lets Daisy believe he is from her social class, hiding the truth that he has “no comfortable family standing behind him.”

At the center of all this is Gatsby’s belief in the American Dream. He thinks he can remake himself entirely—his past and his future—through sheer will and ambition. But that transformation comes at a cost: he becomes “hollow, disconnected from his past,” living more as a performance than a person. His name change, then, captures the novel’s question of how far a person can go in remaking themselves before they lose something essential along the way.