What was C.S. Lewis’s baptismal first name?

C.S. Lewis’s baptismal first name was Clive. His full name was Clive Staples Lewis, although he was widely known by his initials, C.S. Lewis.

Lewis’s childhood nickname was “Jack,” a name he adopted after the death of a childhood dog named Jacksie. Friends and family continued to call him Jack for much of his life, making Clive an easy detail to overlook.

The initials C.S. became strongly associated with his works of fantasy, literary criticism, apologetics, and Christian reflection. Using initials also gave his book titles a formal and distinctive appearance.

His middle name, Staples, came from his mother’s family. Lewis’s brother Warren was usually known as Warnie, and the brothers remained close throughout their lives.