 In one interpretation, Proto-Semitic itself is assumed to have reached the Arabian Peninsula by approximately the 4th millennium BC, from which Semitic daughter languages continued to spread outwards.When written records began in the late fourth millennium BC, the Semitic-speaking Akkadians (Assyrians and Babylonians) were entering Mesopotamia from the deserts to the west, and were probably already present in places such as Ebla in Syria.Akkadian personal names began appearing in written record in Mesopotamia from the late 29th century BC.