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

The writer known as C.S. Lewis was named Clive Staples Lewis.

Lewis was born in Belfast, Ireland, on 29 November 1898. “C.S.” came from his first and middle names, Clive Staples, rather than from a shortened version of a longer pen name. His family and friends often called him Jack, a nickname he adopted after the death of a childhood dog named Jacksie.

Lewis became one of the twentieth century’s best-known Christian writers and literary scholars. His major works include The Chronicles of Narnia, Mere Christianity, The Screwtape Letters, and The Problem of Pain. He also wrote literary criticism and academic studies of medieval and Renaissance literature.

A common mix-up is assuming that “C.S.” stands for “Christian writer” or “Charles.” It refers directly to Clive Staples, while “Jack” was his familiar personal name.