What was C.S. Lewis’s birth name, including the middle name he shared with his initials?

C.S. Lewis’s birth name was Clive Staples Lewis. He was born on 29 November 1898 in Belfast, Ireland, then part of the United Kingdom of Great Britain and Ireland.

The initials “C.S.” came directly from his first and middle names. Lewis was commonly called “Jack” by family and friends, a nickname that originated from his childhood association with a dog named Jacksie. He continued using Jack throughout his adult life.

Lewis became one of the twentieth century’s best-known Christian writers and literary scholars. His books include The Chronicles of Narnia, The Space Trilogy, Mere Christianity, and The Problem of Pain. Some readers mistakenly assume that “C.S.” stood for “Charles Staples,” but the initials represented Clive Staples. His brother, Warren Hamilton Lewis, was usually known as Warnie and later helped preserve records of their family life.