The form 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 already within the epigraphy of Western Greek alphabets, along with https://bud-naked-kits20864.dailyhitblog.com/36762942/the-bud-naked-kits-diaries