Cornelius \c(o)-rne-lius, cor-nelius\ as a boy's name is pronounced kor-NEEL-yus. It is of Latin origin, and the meaning of Cornelius is "horn". A famous Latin clan name, often used under the Roman Empire. Biblical: Cornelius was a Roman centurion who was baptized by Peter. Also the name of a third-century pope who is venerated as a saint. Railroad millionaire Cornelius Vanderbilt.
For more information, see also the related name Kornel.