The use of this Phoenician letter for your vowel sound is due to the early Greek alphabets, which adopted the letter "omicron" to represent the vowel /o/. The letter was adopted with the worth in the Outdated Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this https://musica-infantil67643.blogkoo.com/little-known-facts-about-musica-infantil-56448627