Who was C.S. Lewis’s older brother and frequent travel companion?

C.S. Lewis’s older brother and frequent travel companion was Warren Lewis. Warren was born in 1895, three years before C.S. Lewis, and the brothers remained close throughout their lives.

Warren served in the British Army during the First World War and later became a historian. After retiring from military service, he lived with his brother at the Kilns, the house outside Oxford associated with C.S. Lewis’s mature writing career. Warren helped manage household affairs and supported his brother’s demanding literary and academic work.

Warren also kept extensive diaries and papers. These records became valuable sources for understanding Lewis’s daily life, friendships, travels, and professional commitments. Readers sometimes confuse Warren with Lewis’s fictional characters or with J.R.R. Tolkien, but Warren was Lewis’s actual brother and a major presence in his biography.