What was the full name of the British writer C.S. Lewis?

The full name of the British writer C.S. Lewis was Clive Staples Lewis.

He was born on 29 November 1898 in Belfast, Ireland, then part of the United Kingdom. “C.S.” came from his first and middle names, Clive Staples, rather than from a shortened title or pseudonym.

Lewis was widely known by “Jack,” a nickname he adopted during childhood. His literary career included fantasy, Christian apologetics, literary criticism, science fiction, and autobiography. The initials became especially recognizable through works such as The Chronicles of Narnia and Mere Christianity.

Lewis is sometimes confused with American authors who also used initials, including C.S. Forester and C.L. Lewis. His brother, Warren Hamilton Lewis, was also a writer and historian, but he did not share the same initials.