C comes from the same letter as G or g. The Semites named it gimel. The sign is possibly adapted from an Egyptian hieroglyph for a staff sling, which may have been the meaning of the name gimel. Another possibility is that it depicted a camel, the Semitic name for which was gamal.
This image is part of a project in the making. I aim to collect all the letters of the alphabet. I could be from signs, posters or whatever fits the bill.
(View on black recommended)