The usage of this Phoenician letter for your vowel seem is due to the early Greek alphabets, which adopted the letter "omicron" to signify the vowel /o/. The letter was adopted with the value inside the Previous Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this https://osapinhoeaborboleta12210.win-blog.com/17907466/o-sapinho-e-a-borboleta-an-overview