The Paleo-Hebrew script, also Palaeo-Hebrew, Proto-Hebrew or Old Hebrew, is the writing system found in inscriptions of Canaanite languages from the region of Southern Canaan, also known as biblical Israel and Judah. It is considered to be the script used to record the original texts of the Hebrew Bible due to its similarity to the Samaritan script, as the Talmud stated that the Hebrew ancient script was still used by the Samaritans. The Talmud described it as the "Libona'a script", translated by some as "Lebanon script". Use of the term "Paleo-Hebrew alphabet" is due to a 1954 suggestion by Solomon Birnbaum, who argued that "[t]o apply the term Phoenician [from Northern Canaan, today's Lebanon] to the script of the Hebrews [from Southern Canaan, today's Israel-Palestine] is hardly suitable". The Paleo-Hebrew and Phoenician alphabets are two slight regional variants of the same script.

The Proto-Sinaitic script is a Middle Bronze Age writing system known from a small corpus of about 30-40 inscriptions and fragments from Serabit el-Khadim in the Sinai Peninsula, as well as two inscriptions from Wadi el-Hol in Middle Egypt. Together with about 20 known Proto-Canaanite inscriptions, it is also known as Early Alphabetic, i.e. 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 Canaanite language repurposed Egyptian hieroglyphs to construct a different script.