The correct spelling of the name commonly pronounced as "Oniell" is actually "O'Neill". The IPA phonetic transcription for this name is /oʊˈnɪl/. The 'O' represents the vowel sound as in 'home', the first 'n' is pronounced with a similar sound to the 'ng' in 'song', while the second 'n' is pronounced with the 'n' sound as in 'no'. The 'e' in 'Neill' is pronounced as a short vowel sound as in 'bit' and the 'll' is pronounced with a slight y-sound after it.