Proto-Sinaitic script based on Egyptian hieroglyphs
Proto-Sinaitic (also referred to as Proto-Canaanite when found in Canaan, or Early Alphabetic) is found in a small corpus of c. 40 inscriptions and fragments, the vast majority from Serabit el-Khadim in the Sinai Peninsula, dating to the Middle Bronze Age. They are considered the earliest trace of alphabetic writing and the common ancestor of both the Ancient South Arabian script and the Phoenician alphabet, which led to many modern alphabets including the Greek alphabet. According to common theory, Canaanites or Hyksos who spoke a Semitic language repurposed Egyptian hieroglyphs to construct a different script.The earliest Proto-Sinaitic inscriptions are mostly dated to between the mid-19th (early date) and the mid-16th (late date) century BC.History
The letters of the earliest script used for Semitic languages were derived from Egyptian hieroglyphs. In the 19th century, the theory of Egyptian origin competed alongside other theories that the Phoenician script developed from Akkadian cuneiform, Cretan hieroglyphs, the Cypriot syllabary, and Anatolian hieroglyphs. Then the Proto-Sinaitic inscriptions were studied by Alan Gardiner who identified the word bʿlt "Lady" occurring several times in inscriptions, and also attempted to decipher other words. In the 1950s and 1960s, William Albright published interpretations of Proto-Sinaitic as the key to show the derivation of the Canaanite alphabet from hieratic.According to the "alphabet theory", the early Semitic proto-alphabet reflected in the Proto-Sinaitic inscriptions would have given rise to both the Ancient South Arabian script and the Proto-Canaanite alphabet by the time of the Late Bronze Age collapse (1200–1150 BC).For example, the hieroglyph for pr "house" (a rectangle partially open along one side, "O1" in Gardiner's sign list) was adopted to write Semitic /b/, after the first consonant of baytu, the Semitic word for "house".A transitional stage between Proto-Canaanite and Old Phoenician (1000–800 BC) has been proposed by authors such as Werner Pichler as the origin of the Libyco-Berber script used among Ancient Libyans (i.e. Proto-Berbers) – citing common similarities to both Proto-Canaanite proper and its early North Arabian descendants.