The pen name used by author Clive Staples Lewis is C.S.
Lewis was born Clive Staples Lewis in Belfast, Ireland, in 1898. He generally preferred the name Jack, a nickname adopted during childhood, but published his books under the initials C.S. Lewis. The initials represent his first two given names, Clive and Staples; his surname was Lewis.
The abbreviation became internationally associated with his fiction, Christian apologetics, literary criticism, and autobiography. It is sometimes mistakenly expanded as “Clive Staples,” without recognizing that C.S. is an initial-based author name rather than a separate personal name. Lewis’s brother, Warren Hamilton Lewis, was also a writer and historian, but he used the name W.H. Lewis.
The initials appear on works including The Lion, the Witch and the Wardrobe, Mere Christianity, and The Four Loves. His use of initials also places him in a literary tradition shared by authors such as J.R.R. Tolkien, though the two men had different publishing names and styles.