The correct spelling of the name "Nephthoah" is a bit tricky because it doesn't follow typical English phonetics. The first syllable is pronounced "nef" with a short "e" sound. The second syllable is pronounced "thoh" with a short "o" sound. The "ph" in the name is pronounced like an "f". The final syllable, "-ah," is pronounced with a long "a" sound. Overall, the IPA transcription for "Nephthoah" is "ˈnɛftoʊə". With this knowledge, you can now spell and pronounce this name with confidence.