The spelling of the name "Vaniessa" is not common, and it may often be misspelled due to its similarity with the name "Vanessa". The correct spelling is pronounced as /vəˈniːsə/ in IPA phonetic transcription. The first syllable is pronounced with a schwa vowel sound, while the next two syllables have a long "e" sound. The final syllable has a short "uh" sound. It is important to pay attention to the spelling and pronunciation of unique names to ensure proper communication and respect.