The spelling of the surname "McCauley" is phonetically transcribed as /məˈkɔːli/. The first syllable "Mc" represents the Gaelic prefix "mac," meaning "son of," and is pronounced as "mak." The second syllable "Cau" is pronounced as "kaw," while the third syllable "ley" is pronounced as "lee." The letter "a" in the second syllable is pronounced as a short "o" sound. The correct spelling is often confused due to the various ways it can be spelled, including McCauley, McAuley, McCaulley, and McKayley, among others.
The word "McCauley" is said to have Irish origins and is an Anglicized form of the Irish surname Mac Cathmhaoil. "Mac" means "son of", and "Cathmhaoil" is thought to mean "battle chief" or "battle ruler" in Irish Gaelic. Therefore, "Mac Cathmhaoil" can be roughly translated as "son of the battle chief" or "son of the battle ruler". Over time, the name was anglicized and spelled in various ways, with "McCauley" being one of the common versions.