Which pseudonym appears on J.K. Rowling’s Harry Potter books?

J. K. Rowling is the pseudonym that appears on J.K. Rowling’s Harry Potter books.

Rowling’s birth name is Joanne Rowling. Her publisher, Bloomsbury, reportedly wanted a name that would appeal broadly to young readers and asked for two initials rather than using her first name. Rowling had no middle name, so “K” was taken from Kathleen, her paternal grandmother’s name.

The initials helped create a professional author identity while avoiding a strongly gendered presentation. The books were marketed as written by J. K. Rowling, and the name became one of the best-known author brands in modern publishing.

Rowling has also published under other names. Her adult novel The Casual Vacancy appeared under J. K. Rowling, while her crime novels use Robert Galbraith. “Joanne Kathleen Rowling” is therefore a biographical name, but “J. K. Rowling” is the canonical printed author name for Harry Potter.