Eva Ritvo is spelled as /ˈɛvə ˈrɪtvoʊ/. In this phonetic transcription, the vowel sound "e" is pronounced as "eh", while the stress is on the second syllable "rit". The "v" is pronounced as "vuh", "o" is pronounced as "oh", and the stress is on the second syllable "vo". The pronunciation of this name may vary depending on accents and dialects, but the standardized IPA phonetic transcription ensures accurate communication of the pronunciation.
There does not seem to be a commonly known etymology for the term "Eva Ritvo". It is possible that it is a proper name or a combination of two names, but without more information, it is difficult to determine its origin or meaning.