What was C.S. Lewis’s middle name immediately after “Clive”?

C.S. Lewis’s middle name immediately after “Clive” was Staples.

Lewis’s full name was Clive Staples Lewis. He was born Clive Staples Lewis on 29 November 1898 in Belfast. The initials “C.S.” became the form by which he was publicly known, especially as an author and academic.

As a child, Lewis was called “Jack” by family and friends rather than “Clive.” The nickname arose after his dog Jacksie was killed by a car; Lewis then adopted the name Jack and retained it for the rest of his life. “C.S. Lewis” was therefore his authorial name, while “Jack” was his familiar personal name.

Staples was a family name connected with his mother’s side. It is often mistaken for a second first name or omitted entirely when Lewis is identified only by his initials. His brother Warren was also known by the nickname “Warnie,” creating another possible source of confusion in biographical accounts.