Cornelius 'Neeley' Nolan is the protagonist's younger brother in the novel A Tree Grows in Brooklyn Cornelius Agrippa is a celebrated German wizard in the Harry Potter series and Shakespeare used the name for characters in his plays Hamlet and Cymbeline. In the 19th century, Cornelius Vanderbilt was an American business magnate who expanded and improved upon the country's transportation infrastructure. In the Bible, Cornelius is said to be a Roman centurion who was the first non-Jewish person to convert to Christianity. Cornelius is thought to derive from the Latin word for horn, but this name has a far broader meaning in history.