What was J.R.R. Tolkien’s first name in everyday use?

J.R.R. Tolkien’s first name in everyday use was Ronald.

He was born John Ronald Reuel Tolkien, but family and friends generally called him Ronald or, especially in childhood, Ron. The initials in his literary name therefore stand for John, Ronald, and Reuel. “Reuel” was also used as a personal name within the Tolkien family, but Ronald was his customary given name.

The author is often referred to simply as J.R.R. Tolkien because the initials became inseparable from his public identity. His full name appears on biographical records, academic documents, and editions of his books, while the initials provide a memorable pen name and authorial signature.

Christopher Tolkien was his third son, not the author’s middle name or an alternative version of Ronald. Likewise, John is his first given name but not the name most people around him used. Distinguishing the formal name from the everyday name makes the answer precise.