The shape of Latin S arises from Greek Σ by dropping just one out of the 4 strokes of that letter. The (angular) S-condition made up of a few strokes existed to be a variant of the 4-stroke letter Σ now within the epigraphy of Western Greek alphabets, as well https://bud-naked-mushrooms21874.thelateblog.com/31842097/not-known-facts-about-bud-naked