The correct spelling of "hath notion" is actually "has notion." The word "hath" is an old form of "has" that is no longer commonly used in modern English. The pronunciation of "has" is /hæz/ in IPA phonetic transcription. Meanwhile, "notion" is pronounced as /ˈnoʊʃən/. So, the correct pronunciation of "has notion" is /hæz ˈnoʊʃən/. It's important to pay attention to proper spelling and pronunciation to avoid confusion and ensure effective communication.