Neuwirth is a German surname that is spelled as /ˈnɔɪvɜːθ/ in IPA phonetic transcription. The first syllable "neu" is pronounced as /nɔɪ/, with the "eu" sound similar to the "oy" sound in "boy." The second syllable "wirth" is pronounced as /vɜːθ/, with the "th" sound at the end. The spelling of Neuwith follows German phonetic rules, where the "w" is pronounced as a "v" and the "th" as "t." It is essential to have correct spellings to avoid misunderstandings and ensure proper communication.