The spelling of the name "Annthea" is not commonly used, and is likely a unique variation of the more common name "Anthea". The correct pronunciation of "Annthea" would be /ænθiə/ in IPA phonetic transcription, with emphasis on the second syllable. The use of double "n" in the name suggests it is a deliberate alteration of the traditional spelling. While unconventional, the name "Annthea" offers a distinctive and personalized alternative for parents seeking a unique name for their child.